ASTM D8369-21

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8369 − 21
Standard Test Method for
Detailed Hydrocarbon Analysis by High Resolution Gas
Chromatography with Vacuum Ultraviolet Absorption
Spectroscopy (GC-VUV)
This standard is issued under the fixed designation D8369; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.2.3 Othercompoundscontainingoxygen,sulfur,nitrogen,
and so forth, may also be present, and may co-elute with the
1.1 This test method covers the use of gas chromatography
hydrocarbons. If determination of other specific compounds is
andvacuumultravioletabsorptionspectroscopy(GC-VUV)for
required, supplementation of the spectral library may be
the determination of individual compounds and compound
necessary.
classes by percent mass or percent volume with a final boiling
point as defined by Test Method D86 up to 225 °C.
1.3 Class-type composition – paraffins, iso-paraffins,
1.1.1 Typical products encountered in petroleum refining or olefins, naphthenes, aromatics and oxygenates are reported.
biofuel operations, such as blend stocks; naphthas, reformates,
The class composition totals are the sum of speciated indi-
alkylates, FCC gasoline, liquefied petroleum gas (LPG), alco- vidual compounds and spectrally classed compounds.
hols and ethers may be analyzed.
1.3.1 The class types may optionally be sub classed by
1.1.2 Spark-ignition engine fuels including those with com-
carbon number.
monly blended oxygenates may also be analyzed.
1.3.2 Olefins may optionally be sub classed into mono-
olefins, non-conjugated diolefins, conjugated diolefins, and
1.2 Individual compounds are spectrally verified and spe-
cyclic olefins.
ciated. Compounds that are not spectrally verified and spe-
1.3.3 Aromatics may optionally be sub classed into mono-
ciated are identified by carbon number, based on retention
aromatics, diaromatics, and naphtheno-aromatics (indans and
index, and by class type, based on spectral response. The
indenes).
resulting verified hydrocarbon analysis therefore identifies,
classifies, and reports 100 % of the spectral responses.
NOTE 2—Interim precision for optional sub class reporting is not
1.2.1 This test method may not be applicable to all concen- determined.
trations of individual hydrocarbons; the user must evaluate the
1.4 Individual compounds may not be baseline-separated by
spectral response of the hydrocarbon of interest, the amount
the procedure described in this method; that is, some com-
and proximity of co-eluting hydrocarbons, and detector satu-
pounds will coelute.The coelutions are resolved at the detector
ration. Quantitation of individual hydrocarbons with concen-
using VUV absorbance spectra and deconvolution algorithms.
trations less than 0.1 % or greater than 30 % by mass may
1.5 This test method is intended as a type of detailed
require validation.
hydrocarbon analysis (DHA). Incorporation of the GC-VUV
1.2.2 Thistestmethodcanbeusedtodeterminemethanolin
data report into commercial DHA software packages with
the range of 0.05 % to 3 % by mass, ethanol in the range of
subsequent physical and chemical property calculations and
0.05 % to 25 % by mass, butanols in the range of 0.5 % to
correlations is the responsibility of the DHA software vendor.
10 % by mass, methyl t-butyl ether (MTBE) in the range of
0.5 % to 22 % by mass, ethyl t-butyl ether (ETBE) in the range
1.6 Temporary precision has been determined on a limited
of 0.5 % to 22 % by mass, and t-amyl methyl ether (TAME) in
subset of samples and compounds given in Table 6 and Table
the range of 0.5 % to 22 % by mass in spark-ignition engine
7.
fuels.
1.7 Units—The values stated in SI units are to be regarded
NOTE 1—Applicable ranges of individual components and precision
as standard. No other units of measurement are included in this
will ultimately be defined by an interlaboratory study.
standard.
1.8 This standard does not purport to address all of the
This test method is under the jurisdiction of ASTM Committee D02 on
safety concerns, if any, associated with its use. It is the
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
responsibility of the user of this standard to establish appro-
Subcommittee D02.04.0L on Gas Chromatography Methods.
priate safety, health, and environmental practices and deter-
Current edition approved April 1, 2021. Published May 2021. DOI: 10.1520/
D8369-21. mine the applicability of regulatory limitations prior to use.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D8369 − 21
1.9 This international standard was developed in accor- 3.1.3.1 Discussion—A time factor necessary to convert a
dance with internationally recognized principles on standard- response area to a true mathematical area cancels out of all
ization established in the Decision on Principles for the critical calculations and is omitted.
Development of International Standards, Guides and Recom-
3.2 Definitions of Terms Specific to This Standard:
mendations issued by the World Trade Organization Technical
3.2.1 retention index, n—linear alkane retention indices are
Barriers to Trade (TBT) Committee.
assigned as multiples of 100 according to carbon number.
3.2.1.1 Discussion—A linear interpolation scheme between
2. Referenced Documents
n-alkanes along with retention index windows is sufficient to
2.1 ASTM Standards:
narrow the search in the library database.
D86 Test Method for Distillation of Petroleum Products and
3.2.2 verified hydrocarbon analysis, n—the summed result
Liquid Fuels at Atmospheric Pressure
of spectrally verified, library matched components and com-
D4057 Practice for Manual Sampling of Petroleum and
ponents identified by carbon number and class type.
Petroleum Products
3.3 Abbreviations:
D4307 Practice for Preparation of Liquid Blends for Use as
3.3.1 AU—absorbance units
Analytical Standards
D4814 Specification for Automotive Spark-Ignition Engine
3.3.2 DHA—detailed hydrocarbon analysis
Fuel
3.3.3 GC-VUV—gaschromatographywithvacuumultravio-
D5842 Practice for Sampling and Handling of Fuels for
let absorption spectroscopy
Volatility Measurement
3.3.4 RI—retention index
D6299 Practice for Applying Statistical Quality Assurance
3.3.5 RRF—relative response factor
and Control Charting Techniques to Evaluate Analytical
Measurement System Performance
4. Summary of Test Method
D6300 Practice for Determination of Precision and Bias
Data for Use in Test Methods for Petroleum Products,
4.1 A sample is introduced to a gas chromatographic (GC)
Liquid Fuels, and Lubricants
system. After volatilization, the effluent is introduced onto a
D6729 Test Method for Determination of Individual Com-
GC column for separation, and then detected by a vacuum
ponents in Spark Ignition Engine Fuels by 100 Metre
ultraviolet absorption spectroscopy detector. The separation is
Capillary High Resolution Gas Chromatography
accomplished using a 60 m, nonpolar phase capillary column
D6730 Test Method for Determination of Individual Com-
and a moderately fast temperature ramp (typical operating
ponents in Spark Ignition Engine Fuels by 100-Metre
parametersofthistestmethodaregiveninTable1).Coelutions
Capillary (with Precolumn) High-Resolution Gas Chro-
are resolved by the detector using vacuum ultraviolet absor-
matography
bance spectra and deconvolution.
D6792 Practice for Quality Management Systems in Petro-
4.2 The result of the measurement is the determination of
leum Products, Liquid Fuels, and Lubricants Testing
the total response areas of the five hydrocarbon classes of
Laboratories
paraffins, isoparaffins, olefins, naphthenes, and aromatics, in
D7372 Guide for Analysis and Interpretation of Proficiency
addition to individual species components. The percent mass
Test Program Results
concentrations are calculated from the response areas using
D7900 Test Method for Determination of Light Hydrocar-
class-based or compound-specific relative response factors, as
bons in Stabilized Crude Oils by Gas Chromatography
appropriate. The volume percent concentrations are calculated
from the mass concentrations by applying specific component
3. Terminology
or class-based density values as appropriate.
3.1 Definitions:
3.1.1 integration filter, n—a mathematical operation per-
5. Significance and Use
formed on an absorbance spectrum for the purpose of convert-
5.1 The determination of class group composition of hydro-
ing the spectrum to a single-valued response suitable for
carbon streams and automotive spark-ignition fuels as well as
representation in a two-dimensional chromatogram plot.
quantification of various individual species such as oxygenates
3.1.2 library reference spectrum, n—an absorbance spec-
and aromatics is useful for evaluating quality and expected
trum representation of a molecular species stored in a library
performance.
database and used for identification of a compound/compound
class or deconvolution of multiple coeluting compounds.
3.1.3 response area, n—generally refers to a response The sole source of supply of the apparatus known to the committee at this time
is VUV-Analytics, Cedar Park, Texas. If you are aware of alternative suppliers,
summed over a given time interval and has units of absorbance
please provide this information to ASTM International Headquarters. Your com-
units (AU).
ments will receive careful consideration at a meeting of the responsible technical
committee, which you may attend.
The vacuum ultraviolet absorption apparatus is covered by a patent. Interested
For referenced ASTM standards, visit the ASTM website, www.astm.org, or parties are invited to submit information regarding the identification of an
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM alternative(s) to this patented item to the ASTM International Headquarters. Your
Standards volume information, refer to the standard’s Document Summary page on comments will receive careful consideration at a meeting of the responsible
the ASTM website. technical committee, which you may attend.
D8369 − 21
TABLE 1 Typical Instrument Settings for GC-VUV Sample
7.6.1 The detector shall be able to interface with a gas
A
Measurement
chromatographic system and measure an eluent with a scan
Standard Conditions
frequency of at least 5 Hz with a baseline peak-to-peak noise
Capillary, 60 m × 0.25 mm ID ×
Column Dimensions
width over a 10 s interval no greater than 0.002 AU when
0.25 µm film thickness
B
Column phase Nonpolar (for example, 100 %
averaged over the following wavelength regions: 125 nm to
dimethyl polysiloxane)
240 nm, 170 nm to 200 nm, 125 nm to 160 nm, and 0.001 AU
C
Carrier Gas Helium
when averaged over the 140 nm to 160 nm wavelength region.
Injector temperature 250 °C
D
Injection volume 1.0 µL
7.6.2 The detector shall be equipped with a shutter or
D
Split ratio 300:1
equivalent mechanism that allows the detector array to be
Column flow (constant flow mode) 2.0 mL ⁄min
blocked from the light source in order to perform a “dark”
Oven initial temperature 5 °C
Hold time 4 min
measurement of electronic noise level.
Oven ramp 1 18 °C ⁄min
7.6.3 Thedetectorshallbeequippedwithaflowcellcapable
Oven temperature 1 50 °C
of being heated to at least 275 °C.
Hold time 14 min
Oven ramp 2 5.5 °C ⁄min
7.6.4 The detector shall have an independently controlled
Final oven temperature 200 °C
makeup gas capability, capable of providing up to 5 mL⁄min
Final Hold 0 min
additional flow of nitrogen, helium, or argon to the flow cell.
Detector makeup gas pressure
as per manufacturer’s instructions
(gauge)
7.7 Data Processing System, capable of storing and pro-
Data scan rate 5.0 Hz
Detector flow cell temperature 275 °C
cessing absorbance scan data and corresponding time.
Transfer line temperature 275 °C
7.7.1 Data processing system shall include a database li-
A
Alternate instrument settings are presented in Appendix X3.
brary of vacuum ultraviolet absorption reference spectra,
B
Columns with low bleed phases such as MS grade have been successfully used
compound class information, carbon number, density, and
for this application (see 11.6).
C
The typical flow rate is for helium carrier gas, other carrier gases may be utilized approximate retention index values. Data processing system
(see 8.2).
shall also store relative response factors for each hydrocarbon
D
Other injection volumes and split ratios may be used to achieve the required
class in addition to relative response factors for individually
benzene response (see 13.2).
reported compounds.
7.7.2 Data processing system shall be capable of imple-
menting equations and fit procedures that result in deconvolu-
6. Interferences
tion of absorbance spectra that contain contributions from
6.1 Interferenceswiththistestmethod,ifany,havenotbeen
multiple species.
determined.
7.7.3 Data processing system shall be capable of binning
and storing response contributions from each deconvolution
7. Apparatus
analysis and reporting a combined total response at the end of
7.1 Gas Chromatograph, equipped with automated oven
the analysis.
temperature control and split/splitless inlet.
7.7.4 Data processing system shall be capable of imple-
7.1.1 Flow Controllers—The gas chromatograph must be
menting equations to convert response areas to percent mass
equipped with mass flow controllers capable of maintaining
and further convert percent mass to percent volume.
carrier gas flow constant to 61 % over the full operating
temperature range of the column. The inlet pressure of the
8. Reagents and Materials
carrier gas supplied to the gas chromatograph must be at least
8.1 Purity of Reagents—Reagent grade chemicals shall be
485 kPa.This will ensure that the minimum pressure needed to
used in all tests. Unless otherwise indicated, it is intended that
compensate for the increase in column back-pressure as the
all reagents shall conform to the specifications of the commit-
column temperature is maintained.
tee on Analytical Reagents of the American Chemical Society
7.1.2 It is highly recommended that the gas chromatograph
where such specifications are available. Other grades may be
is equipped with an autosampler. All statistical data were
used, provided it is first ascertained that the reagent is of
obtained using a GC equipped with an autosampler.
sufficiently high purity to permit its use without lessening the
7.2 Carrier Gas, for gas chromatograph: helium, nitrogen,
accuracy of the determination.
or hydrogen (see 8.2).
8.2 Nitrogen, helium, or hydrogen carrier gas for gas
7.3 Purge/Makeup Gas, for detector: helium, nitrogen, or
chromatograph, 99.999 % pure.
argon (see 8.3).
NOTE 3—Helium carrier gas was used to develop temporary precision
7.4 Oxygen, Water, Hydrocarbon Filters, to further purify
statement.
GC carrier gas and detector purge/makeup gas.
7.5 Capillary Analytical Column, nonpolar (for example,
dimethyl polysiloxane) phase, dimensions 60 m length,
ACS Reagent Chemicals, Specifications and Procedures for Reagents and
0.25 mm internal diameter, 0.25 µm film thickness.
Standard-Grade Reference Materials, American Chemical Society, Washington,
DC. For suggestions on the testing of reagents not listed by theAmerican Chemical
7.6 Vacuum Ultraviolet Absorption Spectroscopy Detector,
Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
capable of measuring 125 nm to 240 nm absorbance spectra
U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
with a wavelength resolution of 1 nm or better. copeial Convention, Inc. (USPC), Rockville, MD.
D8369 − 21
8.3 Nitrogen, helium, or argon purge/makeup gas for stream standard. See Table 3. A typical chromatogram and an
vacuum ultraviolet absorption spectroscopy detector, 99.999 % example of a report are shown in Appendix X1.
pure.
9. Hazards
8.4 Methylenechloride,reagentgrade,usedasasolventtest
9.1 Many of the compounds in automotive spark-ignition
sample and GC rinse solvent. (Warning—Toxic material. May
engine fuel or other test samples used in this test method are
be combustible at high temperatures.)
toxic, flammable, or both. Safety and sample-handling proce-
8.5 Retention time mixture consisting of iC4, C4, iC5, and
dures appropriate for working with such materials shall be in
C5 through C15 linear alkanes, approximately 1 % by mass
place before attempting to use this test method.
each, in suitable solvent such as methylene chloride.
8.5.1 The retention time mixture is used to determine a
10. Sampling
retention time marker list (see 12.1 and 12.2).
10.1 Refer to Practices D4057 and D5842 for guidelines on
8.5.2 The retention time mixture is used to determine
obtaining volatile samples including automotive spark-ignition
splitter linearity (see 13.3.2).
engine fuel samples for analysis. Samples should be kept
8.6 Asystem validation mixture that complies with Practice
refrigerated at approximately 4 °C until ready to be analyzed.
D4307, having the components and approximate concentra-
tions given in Table 2. The concentrations of the prepared
11. Preparation of Apparatus
system validation mixture should be close to those in Table 2
11.1 Ensure that all gas connections are properly made,
and shall otherwise be accurately known.
without leaks.
8.7 Aquality control (QC) sample, similar in characteristics
11.2 Install oxygen, moisture, and hydrocarbon filters in gas
to samples that are to be routinely analyzed. Examples include
lines upstream of GC and detector. Maintain gas filters as
automotive spark-ignition fuel, naphtha, reformate, alkylate
instructed by manufacturer.
and FCC gasoline. See Section 18 Quality Control Monitoring.
11.3 Install the 60 m column in the GC inlet. Condition the
NOTE 4—Refer to Practices D6299 and D6792 for guidance on quality
column according to the column manufacturer’s recommenda-
assurance (QA) practices.
tions prior to installation in the detector.
8.8 A hydrocarbon stream standard used to set up the
11.4 Perform maintenance on the GC as suggested by
spectrally verified peak table and define the report method (see
manufacturer, such as replacing septum and liner.
12.8). The QC sample (8.7) can also be used as a hydrocarbon
11.5 Configure the injector, carrier gas, and other GC
parameters according to Table 1.
TABLE 2 System Validation Mixture
11.6 Inject the solvent test sample defined in 8.4 and run the
Component Concentration (percent mass)
apparatus through a full oven ramp and cool-down cycle.
Cyclopentane 1.1
n-Pentane 1.1
Repeat.
Cyclohexane 2.1
11.6.1 Assess the baseline on either a solvent test sample or
2,3-Dimethylbutane 2.1
a system validation mixture run (see 8.6). The average absor-
n-Hexane 2.1
1-Hexene 1.5
bance value (125 nm to 240 nm) of at least a 0.1 min section of
Methylcyclohexane 4.0
the baseline near the end of the oven ramp shall be no more
4-Methyl-1-hexene 1.6
than 60.0035 AU of the average value (125 nm to 240 nm) of
n-Heptane 3.5
1,2-Dimethylcyclohexane 5.0
the initial 0.5 min to 1.0 min range.
Isooctane 5.0
n-Octane 5.0
12. Calibration and Standardization
1,2,4-Trimethylcyclohexane 4.0
n-Nonane 4.5
12.1 On installation of apparatus, after significant mainte-
n-Decane 4.5
nance of apparatus, or after a significant method change,
n-Undecane 3.5
n-Dodecane 3.5
establish a retention index file. Run the retention time mixture
Benzene 2.2
(see 8.5) using the same flow conditions and oven ramp profile
Toluene 2.2
as measured samples (see Table 1 for recommended run
trans-Decahydronaphthalene 4.0
n-Tetradecane 4.5
conditions).RecordtheretentiontimesofiC4,C4,iC5,andC5
Ethylbenzene 4.5
through C15 linear alkanes. These will serve as retention time
o-Xylene 4.0
markers.
n-Propylbenzene 5.0
1,2,4-Trimethylbenzene 4.5
12.1.1 Significant method changes include changing the
1,2,3-Trimethylbenzene 5.0
GC, column type, make-up gas pressure, or oven ramp profile.
1,2,4,5-Tetramethylbenzene 5.0
Significant maintenance of the apparatus includes replacing or
Pentamethylbenzene 5.0
trimming the analytical column.
Total Paraffins 32.2
Total Isoparaffins 7.1 12.2 A list of retention times and retention indices for the
Total Olefins 3.1
branched and linear alkanes is used to estimate elution times of
Total Naphthenes 20.2
other compounds in the VUV library according to an interpo-
Total Aromatics 37.4
lation scheme. The retention index scheme sets the linear
D8369 − 21
TABLE 3 Report Method Component Data
Component Class Carbon Retention Density at RRF Gasoline Petrol Alkylate Reformate Virgin Pyrolysis Naphtha Naphtha
Number Index 20 °C D4814 EN228 Naphtha Gas Coker FCC
g/mL
Propene Olefin 3 297.3 0.505 0.363
Propane Paraffin 3 300.0 0.501 0.872
Isobutane Isoparaffin 4 360.0 0.557 0.700 X X X X X
Methanol Oxygenate 1 370.4 0.792 1.299 X X
Isobutylene Olefin 4 386.9 0.595 0.387 XX
1-Butene Olefin 4 388.3 0.595 0.387 XX
1,3-Butadiene Olefin 4 393.3 0.621 0.340 XX
n-Butane Paraffin 4 400.0 0.579 0.800 X X X X X X X
Methyl mercaptan Sulfur 1 405.2 0.960 1.350 X
trans-2-Butene Olefin 4 407.5 0.604 0.387 X X X X X
cis-2-Butene Olefin 4 419.2 0.621 0.387 X X X X X
1,2-Butadiene Olefin 4 433.0 0.676 0.370 XX
Ethanol Oxygenate 2 445.6 0.789 1.013 X X
3-Methyl-1-butene Olefin 5 449.5 0.627 .0380 X X X X X
Isopentane Isoparaffin 5 470.4 0.620 0.740 X X X X X X X X
1,4-Pentadiene Olefin 5 474.4 0.661 0.370 XX
Dimethylacetylene Alkyne 4 477.0 0.678 0.400 X
1-Pentene Olefin 5 487.1 0.641 0.380 X X X X X
Isopropanol Oxygenate 3 489.1 0.786 0.863
Ethyl mercaptan Sulfur 2 490.0 0.862 0.735 X
2-Methyl-1-butene Olefin 5 495.1 0.650 0.380 X X X X X
n-Pentane Paraffin 5 500.0 0.626 0.730 X X X X X X X
2-Methyl-1,3-butadiene Olefin 5 503.7 0.681 0.340 X
trans-2-Pentene Olefin 5 506.9 0.648 0.380 X X X X X
cis-2-Pentene Olefin 5 513.4 0.656 0.380 X X X X
tert-Butanol Oxygenate 4 514.4 0.789 0.746
2-Methyl-2-butene Olefin 5 517.7 0.662 0.380 X X X X X
trans-1,3-Pentadiene Olefin 5 520.0 0.676 0.340 XX
Cyclopentadiene Olefin 5 528.0 0.650 0.465 XX
2,2-Dimethylbutane Isoparaffin 6 530.3 0.649 0.740 X X X X X X
cis-1,3-Pentadiene Olefin 5 530.8 0.682 0.340 XX
Isopropyl mercaptan Sulfur 3 540.5 0.820 0.600 X
Cyclopentene Olefin 5 546.3 0.772 0.465 X X X X X
n-Propanol Oxygenate 3 549.6 0.804 0.937
4-Methyl-1-pentene Olefin 6 551.5 0.667 0.400 X X X X X
3-Methyl-1-pentene Olefin 6 552.4 0.664 0.400 X X X X X
Cyclopentane Naphthene 5 556.6 0.745 0.828 X X X X X X X
2,3-Dimethylbutane Isoparaffin 6 559.9 0.662 0.740 X X X X X X X
Methyl tert-butyl ether Oxygenate 5 560.9 0.740 0.819 X
2,3-Dimethyl-1-butene Olefin 6 561.8 0.678 0.400 X X X X X
cis-4-Methyl-2-pentene Olefin 6 563.7 0.674 0.400 X X X X
2-Methylpentane Isoparaffin 6 565.6 0.653 0.740 X X X X X X X X
trans-4-Methyl-2-pentene Olefin 6 567.4 0.674 0.400 X X X X X
3-Methylpentane Isoparaffin 6 580.1 0.664 0.740 X X X X X X X X
1,5-Hexadiene Olefin 6 582.0 0.692 0.370 X
2-Methyl-1-pentene Olefin 6 586.2 0.685 0.400 X X X X X
1-Hexene Olefin 6 587.6 0.678 0.400 X X X X X
2-Butanol Oxygenate 4 590.9 0.808 0.905
trans-1,4-Hexadiene Olefin 6 592.0 0.710 0.370 X
n-Propyl mercaptan Sulfur 3 593.6 0.841 0.600 X
2-Ethyl-1-butene Olefin 6 599.4 0.689 0.400 X X X X
n-Hexane Paraffin 6 600.0 0.659 0.785 X X X X X X X
DIPE Oxygenate 6 601.9 0.725 0.837
trans-3-Hexene Olefin 6 602.2 0.682 0.400 X X X X X
cis-3-Hexene Olefin 6 602.9 0.685 0.400 X X X X X

D8369 − 21
TABLE 3 Continued
Component Class Carbon Retention Density at RRF Gasoline Petrol Alkylate Reformate Virgin Pyrolysis Naphtha Naphtha
Number Index 20 °C D4814 EN228 Naphtha Gas Coker FCC
g/mL
trans-2-Hexene Olefin 6 604.2 0.683 0.400 X X X X X
2-Methyl-2-pentene Olefin 6 606.2 0.691 0.400 X X X X
cis-2-Hexene Olefin 6 611.8 0.692 0.400 X X X X X
Ethyl tert-butyl ether Oxygenate 6 617.2 0.736 0.766 X
trans-3-Methyl-2-pentene Olefin 6 617.2 0.702 0.400 X X X X X
Isobutanol Oxygenate 4 617.8 0.802 0.858
Methylcyclopentane Naphthene 6 620.8 0.749 0.805 X X X X X X X
2,4-Dimethylpentane Isoparaffin 7 626.1 0.673 0.760 X X X X X X X X
2,2,3-Trimethylbutane Isoparaffin 7 629.4 0.693 0.760 X X X X
1-Methyl-1,3-cyclopentadiene Olefin 6 632.1 0.706 0.465 X
1-Methylcyclopentene Olefin 6 642.4 0.780 0.500 X X X X
Benzene Aromatic 6 642.4 0.879 0.258 X X X X X X X
Thiophene Sulfur 4 646.6 1.051 0.260 X
sec-Butyl mercaptan Sulfur 4 647.0 0.830 0.650 X
3,3-Dimethylpentane Isoparaffin 7 648.4 0.693 0.760 X X X X X
n-Butanol Oxygenate 4 649.4 0.810 0.926
Cyclohexane Naphthene 6 651.0 0.779 0.805 X X X X X X
1,3-Cyclohexadiene Olefin 6 653.0 0.841 0.423 X
tert-Amyl alcohol Oxygenate 5 653.0 0.805 0.824
4-Methyl-1-hexene Olefin 7 658.4 0.705 0.455 X
cis/trans-4-Methyl-2-hexene Olefin 7 661.0 0.711 0.455 X X X X
2-Methylhexane Isoparaffin 7 663.0 0.679 0.760 X X X X X X X X
2,3-Dimethylpentane Isoparaffin 7 663.7 0.695 0.760 X X X X X X X X
1,1-Dimethylcyclopentane Naphthene 7 665.7 0.755 0.740 X X
tert-Amyl methyl ether Oxygenate 6 667.0 0.766 0.877 X
Cyclohexene Olefin 6 667.9 0.811 0.500 XX
3-Methylhexane Isoparaffin 7 671.6 0.687 0.760 X X X X X X X X
cis-3,4-Dimethyl-2-pentene Olefin 7 675.3 0.718 0.455 XX
cis-1,3-Dimethylcyclopentane Naphthene 7 677.6 0.745 0.740 X X X X X X
trans-1,3-Dimethylcyclopentane Naphthene 7 680.6 0.762 0.740 X X X X X X
3-Ethylpentane Isoparaffin 7 682.9 0.698 0.760 X X X X X X X
trans-1,2-Dimethylcyclopentane Naphthene 7 683.6 0.751 0.740 X X X X X
1-Heptene Olefin 7 686.5 0.697 0.455 X
Isooctane Isoparaffin 8 686.9 0.692 0.674 X X X X X
cis-3-Methyl-3-hexene Olefin 7 693.2 0.718 0.455 X X X X
n-Heptane Paraffin 7 700.0 0.684 0.780 X X X X X X
trans-2-Heptene Olefin 7 703.4 0.706 0.455 X X X X
cis-2-Heptene Olefin 7 709.3 0.712 0.455 X
cis-1,2-Dimethylcylopentane Naphthene 7 713.3 0.732 0.740 X X X
Methylcyclohexane Naphthene 7 713.7 0.769 0.740 X X X X X X X
1,1,3-Trimethylcyclopentane Naphthene 8 716.4 0.748 0.680 X X X
Ethylcyclopentane Naphthene 7 723.3 0.766 0.740 X X X X X X X
2,5-Dimethylhexane Isoparaffin 8 725.2 0.694 0.720 X X X X X X X
2.4-Dimethylhexane Isoparaffin 8 726.7 0.700 0.720 X X X X X X X
ctc-1,2,4-Trimethylcyclopentane Naphthene 8 731.1 0.743 0.680 X X X
ctc-1,2,3-Trimethylcyclopentane Naphthene 8 737.8 0.754 0.680 X X
2,3,4-Trimethylpentane Isoparaffin 8 740.8 0.719 0.720 X X X X
Toluene Aromatic 7 744.5 0.867 0.263 X X X X X X
2,3,3-Trimethylpentane Isoparaffin 8 744.9 0.726 0.720 X X X X
2-Methylthiophene Sulfur 5 745.8 1.014 0.270 X
2,3-Dimethylhexane Isoparaffin 8 751.6 0.712 0.720 X X X X X X X
1-Methylcyclohexene Olefin 7 754.6 0.811 0.500 XX
3-Methylthiophene Sulfur 5 754.6 1.027 0.270 XX
2-Methylheptane Isoparaffin 8 758.2 0.698 0.720 X X X X X X
3-Methylheptane Isoparaffin 8 766.5 0.706 0.720 X X X X X

D8369 − 21
TABLE 3 Continued
Component Class Carbon Retention Density at RRF Gasoline Petrol Alkylate Reformate Virgin Pyrolysis Naphtha Naphtha
Number Index 20 °C D4814 EN228 Naphtha Gas Coker FCC
g/mL
1c,2t,3-Trimethylcyclopentane Naphthene 8 767.6 0.763 0.680 X X X
trans-1,4-Dimethylcyclohexane Naphthene 8 769.1 0.763 0.680 X X X X X
1,1-Dimethylcyclohexane Naphthene 8 775.5 0.781 0.680 X X
2,2,5-Trimethylhexane Isoparaffin 9 779.3 0.707 0.850 X X X X
3c-Ethylmethylcyclopentane Naphthene 8 780.2 0.767 0.680 X X X
3t-Ethylmethylcyclopentane Naphthene 8 782.7 0.767 0.680 X X X
1-Octene Olefin 8 784.5 0.765 0.451 X
2t-Ethylmethylcyclopentane Naphthene 8 784.3 0.769 0.680 X X
1-Ethyl-1-methylcyclopentane Naphthene 8 786.7 0.777 0.680 X
trans-1,2-Dimethylcyclohexane Naphthene 8 790.2 0.776 0.680 X X
n-Octane Paraffin 8 800.0 0.703 0.771 X X X X X X X
trans-2 Octene Olefin 8 803.2 0.720 0.451 X
cis-2-Octene Olefin 8 810.0 0.720 0.451 X
cis-1,2-Dimethylcyclohexane Naphthene 8 820.2 0.796 0.680 X X
1,1,4-Trimethylcyclohexane Naphthene 9 825.6 0.772 0.800 X X
Ethylcyclohexane Naphthene 8 831.1 0.784 0.680 X X
Ethylbenzene Aromatic 8 845.3 0.867 0.272 X X X X X X X
ctt-1,2,4-Trimethylcyclohexane Naphthene 9 848.2 0.780 0.800 X X
m-Xylene Aromatic 8 855.9 0.870 0.272 X X X X X X X
p -Xylene Aromatic 8 857.1 0.870 0.272 X X X X X X X
2-Methyloctane Isoparaffin 9 868.9 0.713 0.850 X X X X X X
ctc-1,2,3-Trimethylcyclohexane Naphthene 9 872.1 0.758 0.800 X X
Styrene Aromatic 8 873.7 0.909 0.270 X
3-Methyloctane Isoparaffin 9 875.3 0.721 0.850 X X X X X X
o-Xylene Aromatic 8 878.1 0.870 0.272 X X X X X X X
1-Nonene Olefin 9 890.5 0.768 0.490 X
n -Nonane Paraffin 9 900.0 0.718 0.780 X X X X X X X
trans-2-Nonene Olefin 9 903.9 0.734 0.490 X
Isopropylbenzene Aromatic 9 909.4 0.862 0.280 X X X X X
n-Propylbenzene Aromatic 9 942.0 0.862 0.280 X X X X X X X
1-Methyl-3-ethylbenzene Aromatic 9 950.4 0.865 0.280 X X X X X X X
1-Methyl-4-ethylbenzene Aromatic 9 952.2 0.861 0.280 X X X X X X X
1,3,5-Trimethylbenzene Aromatic 9 957.9 0.865 0.280 X X X X X X X
1-Methyl-2-ethylbenzene Aromatic 9 966.2 0.881 0.280 X X X X X X X
1,2,4-Trimethylbenzene Aromatic 9 980.4 0.876 0.280 X X X X X X X
1-Decene Olefin 10 990.3 0.741 0.474 X
Isobutylbenzene Aromatic 10 993.6 0.853 0.290 X X X X X
sec-Butylbenzene Aromatic 10 995.9 0.862 0.290 X X X X X
n-Decane Paraffin 10 1000.0 0.730 0.765 X X X X X X X
1,2,3-Trimethylbenzene Aromatic 9 1003.5 0.894 0.280 X X X X X X X
1-Methyl-3-isopropylbenzene Aromatic 10 1007.1 0.861 0.290 X X X X X X
1-Methyl-4-isopropylbenzene Aromatic 10 1010.1 0.857 0.290 X X X X X X
Dicyclopentadiene Olefin 10 1012.4 0.986 0.500 X
Indane Aromatic 9 1014.7 0.965 0.296 X X X X X X
Indene Aromatic 9 1021.4 0.996 0.265 X
1,3-Diethylbenzene Aromatic 10 1036.0. 0.860 0.290 X X X X X X
1-Methyl-3-n-propylbenzene Aromatic 10 1038.8 0.861 0.290 X X X X X X X
1-Methyl-4-n-propylbenzene Aromatic 10 1042.4 0.858 0.290 X X X X X X X
n-Butylbenzene Aromatic 10 1043.4 0.861 0.290 X X X X X X X
1,3-Dimethyl-5-ethylbenzene Aromatic 10 1045.9 0.88 0.290 X X X X X X X
1-Methyl-2-n-propylbenzene Aromatic 10 1053.6 0.874 0.290 X X X X X X X
1,4-Dimethyl-2-ethylbenzene Aromatic 10 1064.1 0.877 0.290 X X X X X X X
1,3-Dimethyl-4-ethylbenzene Aromatic 10 1065.6 0.859 0.290 X X X X X X X
1,2-Dimethyl-4-ethylbenzene Aromatic 10 1071.5 0.875 0.290 X X X X X X X
1-Undecene Olefin 11 1089.4 0.750 0.484 X

D8369 − 21
TABLE 3 Continued
Component Class Carbon Retention Density at RRF Gasoline Petrol Alkylate Reformate Virgin Pyrolysis Naphtha Naphtha
Number Index 20 °C D4814 EN228 Naphtha Gas Coker FCC
g/mL
n-Undecane Paraffin 11 1100.0 0.740 0.755 X X X X X X
1,2,4,5-Tetramethylbenzene Aromatic 10 1100.8 0.888 0.290 X X X X X X X
1,2,3,5-Tetramethylbenzene Aromatic 10 1104.6 0.89 0.290 X X X X X X X
Naphthalene Aromatic 10 1160.6 1.025 0.198 X X X X X X X
n-Dodecane Paraffin 12 1200.0 0.753 0.745 X X X X X X
2-Methylnaphthalene Aromatic 11 1274.3 1.010 0.202 X X X X X X X
1-Methylnaphthalene Aromatic 11 1289.2 1.001 0.202 X X X X X X X
n-Tridecane Paraffin 13 1300.0 0.756 0.735 X X X X X X

D8369 − 21
alkane retention indices to multiples of 100 according to ing the entire peak is captured within the window and smaller
carbon number: butane RI = 400, pentane RI = 500, etc. Re- windowsfacilitateimprovedcomponentidentificationanddata
tention indices of compounds eluting between n-alkanes are process speed.
linearly interpreted. 12.7.1 Aretention time window can be used in place of the
12.2.1 Once updated, the same retention time marker list is retention index window.
used for all subsequent measurements until the next modifica-
12.8 Only the individual components defined in the custom-
tion or maintenance of the GC-VUV instrumentation.
ized peak table are reported as spectrally verified. All other
12.3 The conversion from response areas to percent mass components are reported based on class and carbon number.
uses compound specific response factors.The relative response
Customized peak tables are referred to as report methods.
factors account for the differing areal response per unit mass 12.8.1 Examples of individual components of the report
for the various compounds.
method for different products are identified in Table 3 with an
12.3.1 In cases where the identity of the specific compound “X”.
is not known, the conversion from response areas to percent
12.9 Each report method shall have a customized peak table
mass uses class-based and carbon number relative response
and an associated hydrocarbon stream standard (8.8).
factors. The relative response factors account for the differing
12.10 Relative response factors may alternatively be refined
areal response per unit mass for the various hydrocarbon
or determined as described in Appendix X2.
classes and carbon number (Table 3).
NOTE 5—A compound’s relative response factor is a function of the
13. Pre-Measurement Validation
type and number of chemical bonds. See Appendix X4.
13.1 Before proceeding with measurements or after a sig-
12.4 For the purpose of this calculation, the response at a
nificant change or maintenance of the apparatus, the proce-
given elution time refers to the absorbance averaged over the
dures in Section 11 should have been completed, and a
125 nm to 240 nm wavelength region.The response area refers
retention index file generated or verified following the proce-
to the sum of the response over all detector scans within a
dure in 12.1 and 12.2.
given time region.Atrue area can be generated by multiplying
this quantity by the time interval between scans. However, this 13.2 Verify that the total response for benzene is 4.25 6
step is unnecessary when the scan rate is kept constant
0.25 in the system validation mixture (see 8.6).
throughout a given measurement. For the purposes of this test
13.2.1 Iftheresponseisoutofthespecifiedrange,adjustthe
method, the response area is taken to be a sum having units of
detector make-up gas pressure in 0.14 kPa increments and
absorbance units.
reanalyze the system validation mixture, checking the benzene
response until it is in the specified range. Increasing the
12.5 The response factors are relative to the response of
detector make-up gas pressure will decrease the benzene
methane, which is taken to have a relative response factor of 1.
response. Do not adjust the make up gas pressure to less than
12.6 Relative response factors, densities, and retention in-
1.0 kPa or to more than 4.1 kPa.
dices for individual components are given in Table 3. Hydro-
13.2.2 If the detector make-up gas pressure has been
carbon class relative response factors are given in Table 4.
changed, reanalyze the retention index sample (see 12.1 and
12.6.1 Individual components listed in Table 3 have been
12.2) and establish a new retention index file. Adjusting the
spectrally verified, that is, the spectral response of the compo-
detector make-up gas pressure will change retention times.
nentisknown.Theretentionindexprovidesfurthercomponent
Reanalyze the system validation mixture (see 8.6) and verify
validation.
the total response for benzene (see 13.2).
12.6.2 Other components of interest may be added to Table
13.3 The system validation mixture (see 8.6) serves as a
3 provided that the spectral response and retention index are
verification of the analytical system.
known.
13.3.1 System Accuracy—The system validation mixture
12.6.2.1 Conversely, components not of interest may be
percent by mass results for total hydrocarbon group types
deleted from Table 3.
(paraffins, isoparaffins, olefins, naphthenes, and aromatics)
12.7 The component’s retention index specified in Table 3
shall be within 610 % relative of the certified concentration
and the retention index window specified in Table 5 shall be
values.
customized for different sample types. Larger retention index
13.3.2 Split Linearity—The ratio of tetradecane to pentane
windows accommodate high concentration components ensur-
shall be between 3.8 and 4.5.
13.3.2.1 If the split linearity results are unacceptable, verify
that the inlet seals, liner, and column position are designed to
TABLE 4 Relative Response Factors for Bulk Hydrocarbon
minimize split inlet mass discrimination. A GC inlet liner
Classes
packed with deactivated glass wool is recommended.
Hydrocarbon Class Relative Response Factor Range
13.3.3 The benzene, toluene, ethylbenzene, total xylenes,
Paraffin 0.697 – 1.00
and isooctane shall be within 60.2 % by mass of their known
Isoparaffin 0.713 – 0.850
values.
Olefin 0.330 – 0.511
Naphthene 0.680 – 0.879
13.4 Analyze the hydrocarbon stream standard (8.8 and
C9+ Aromatics 0.206 – 0.370
12.9). Verify the spectral response against a library reference
D8369 − 21
TABLE 5 Single Laboratory Percent Mass Repeatability Standard Deviations, Determined According to Practice D6300 Section 6.2.1
Analyte
Paraffin 8.65 0.21 5.64 0.16 10.2 0.26 14.0 0.09 9.36 0.13 9.33 0.26 5.14 0.10 3.47 0.03 21.6 0.1 9.68 0.10 0.763 0.03
Isoparaffin 42.2 0.25 68.57 0.20 22.1 0.31 38.4 0.20 32.5 0.28 28.0 0.23 40.2 0.33 35.4 0.36 30.1 0.5 26.2 0.19 96.3 0.35
Olefin 8.47 0.15 1.71 0.08 0.0843 0.02 5.18 0.08 10.6 0.14 6.33 0.11 6.86 0.09 17.1 0.25 0.178 0.020 0.261 0.03 0.0117 0.01
Naphthene 7.59 0.30 2.89 0.23 5.78 0.09 12.0 0.19 6.31 0.13 4.00 0.13 6.02 0.29 12.7 0.26 34.1 0.4 2.74 0.14 2.96 0.35
Aromatic 0.0008
21.6 0.25 21.2 0.1 61.9 0.6 22.1 0.15 34.3 0.49 42.5 0.52 28.3 0.22 31.3 0.40 14.0 0.0 61.1 0.23 0.00
Isobutane 0.342 0.022 0.395 0.033 0.150 0.009 1.071 0.094 0.127 0.012 0.206 0.016
n-Butane 1.202 0.072 3.626 0.152 2.376 0.136 0.930 0.035 2.005 0.121 3.259 0.207 1.171 0.063 0.135 0.009 0.831 0.044 0.275 0.017
trans-2-Butene 0.200 0.009 0.105 0.006 0.308 0.017
Ethanol 11.454 0.117 5.052 0.054 4.547 0.053
Isopentane 6.716 0.144 5.515 0.104 7.778 0.201 6.918 0.091 11.600 0.231 8.788 0.213 8.040 0.169 10.615 0.252 2.101 0.051 5.063 0.134
1-Pentene 0.217 0.006 0.149 0.003 0.512 0.010 0.140 0.003 0.188 0.006 0.611 0.017
2-Methyl-1-butene 0.529 0.013 0.292 0.004 1.064 0.018 0.124 0.006 0.417 0.009 1.210 0.029
n-Pentane 3.108 0.054 0.307 0.008 4.247 0.109 5.102 0.059 3.600 0.052 2.835 0.057 2.152 0.039 1.184 0.027 1.454 0.029 0.487 0.011
trans-2-Pentene 1.000 0.020 0.167 0.004 0.416 0.009 1.360 0.019 1.562 0.030 0.753 0.014 1.799 0.034
cis-2-Pentene 0.430 0.011 0.205 0.005 0.652 0.010 0.543 0.012 0.319 0.011 0.908 0.022
2-Methyl-2-butene 1.351 0.024 0.218 0.004 0.584 0.006 1.958 0.025 0.603 0.012 0.930 0.018 2.484 0.044
2,2-Dimethylbutane 0.427 0.006 0.117 0.004 0.254 0.006 1.996 0.011 1.467 0.016 0.158 0.003 0.267 0.005
Cyclopentene 0.123 0.212 0.153 0.222 0.006
Cyclopentane 0.299 0.007 0.475 0.012 0.736 0.011 0.398 0.009 0.212 0.006 0.172 0.004 0.197 0.007
2,3-Dimethylbutane 1.478 0.014 1.797 0.023 0.627 0.015 1.392 0.014 1.336 0.013 0.930 0.013 0.980 0.022 1.197 0.013 0.393 0.010 2.574 0.028
Methyl tert-butyl ether 5.686 0.052 1.451 0.024 1.153 0.016 13.444 0.099
2-Methylpentane 3.290 0.026 0.863 0.013 3.983 0.052 4.959 0.029 4.789 0.013 2.989 0.023 2.230 0.015 5.256 0.030 2.792 0.031 2.285 0.023 0.900 0.010
trans-4-Methyl-2-
0.166 0.004 0.154 0.002 0.119 0.004 0.108 0.004 0.266 0.005
pentene
3-Methylpentane 1.929 0.011 0.441 0.005 2.038 0.026 2.822 0.015 2.690 0.009 1.640 0.013 1.208 0.010 3.092 0.017 2.111 0.023 1.636 0.016 0.364 0.006
2-Methyl-1-pentene 0.202 0.012 0.191 0.006 0.107 0.005 0.127 0.009 0.396 0.004
n-Hexane 2.043 0.014 0.149 0.005 2.129 0.023 4.413 0.024 1.723 0.006 1.657 0.008 0.913 0.008 0.829 0.005 6.357 0.063 2.406 0.020
trans-3-Hexene 0.167 0.141 0.113 0.259 0.011
trans-2-Hexene 0.344 0.015 0.294 0.006 0.231 0.004 0.579 0.007
2-Methyl-2-pentene 0.380 0.020 0.197 0.004 0.355 0.023 0.251 0.004 0.291 0.016 0.632 0.029
cis-2-Hexene 0.149 0.002 0.134 0.004 0.107 0.005 0.302 0.005
trans-3-Methyl-2-
0.337 0.011 0.151 0.005 0.296 0.014 0.175 0.040 0.216 0.008 0.610 0.006
pentene
Methylcyclopentane 1.378 0.014 0.258 0.006 3.602 0.042 2.702 0.020 1.882 0.029 1.144 0.028 0.836 0.021 2.541 0.015 3.118 0.050 0.832 0.034
2,4-Dimethylpentane 1.119 0.011 4.514 0.022 0.589 0.008 0.853 0.006 0.329 0.005 0.375 0.006 1.340 0.008 0.429 0.026 0.341 0.010 0.529 0.012 9.055 0.030
1-Methylcyclopentene 0.169 0.010 0.194 0.022 0.174 0.012 0.330 0.033
Benzene 0.844 0.008 0.223 0.004 0.451 0.006 0.686 0.003 0.679 0.005 0.658 0.006 0.401 0.004 0.901 0.008 0.864 0.014 2.257 0.019
Cyclohexane 0.412 0.012 0.546 0.012 1.268 0.011 0.618 0.017 0.646 0.010 0.181 0.011 0.169 0.011 2.777 0.026
2-Methylhexane 1.721 0.046 2.516 0.538 1.929 0.056 1.727 0.036 1.284 0.024 1.400 0.030 0.926 0.121 2.768 0.022 2.812 0.029 3.428 0.033 0.845 0.497
2,3-Dimethylpentane 0.832 0.060 8.886 0.572 0.501 0.057 0.761 0.037 0.359 0.020 0.460 0.036 1.411 0.118 0.409 0.020 0.601 0.031 0.723 0.032 10.605 0.520
3-Methylhexane 1.543 0.011 1.398 0.011 1.672 0.005 1.644 0.007 1.317 0.010 1.484 0.006 0.854 0.005 2.132 0.013 2.885 0.014 3.621 0.017 0.364 0.011
cis-1,3-
0.341 0.011 0.109 0.006 0.370 0.003 0.584 0.006 0.259 0.010 0.132 0.008 0.245 0.005 0.947 0.008 1.129 0.007 0.149 0.008
Dimethylcyclopentane
trans-1,3-
0.281 0.006 0.266 0.005 0.504 0.008 0.222 0.008 0.115 0.005 0.202 0.004 0.816 0.021 1.021 0.012 0.157 0.009
Dimethylcyclopentane
3-Ethylpentane 0.131 0.049 0.139 0.060 0.150 0.029 0.129 0.036 0.147 0.038 0.133 0.031 0.230 0.042 0.370 0.041
Average VUVCS RFG
StdDev
Average Gasoline 1
StdDev
Average Gasoline 2
StdDev
Average Gasoline 3
StdDev
Average Gasoline 4
StdDev
Average Gasoline 5
StdDev
Average Gasoline 6
StdDev
Average FCC Naphtha 1
StdDev
Average Naphtha 1
StdDev
Average Reformate
StdDev
Average Alkylate
StdDev
StdDev Fmax <4.85
D8369 − 21
TABLE 5 Continued
trans-1,2-
0.265 0.037 0.178 0.029 0.720 0.028 0.233 0.031 0.178 0.035 0.494 0.026 1.609 0.038
Dimethylcyclopentane
Isooctane 7.641 0.055 16.975 0.056 5.274 0.022 1.553 0.022 3.544 0.034 11.070 0.058 29.780 0.106
n-Heptane 1.228 0.013 1.024 0.006 0.932 0.006 1.965 0.009 1.275 0.021 1.105 0.011 0.510 0.015 0.494 0.008 6.377 0.033 2.941 0.013
Methylcyclohexane 0.678 0.059 0.116 0.017 1.859 0.037 0.604 0.024 0.250 0.023 0.402 0.031 1.118 0.018 6.625 0.059 0.160 0.014
Ethylcyclopentane 0.206 0.151 0.135 0.165 0.481 0.764 0.115 0.115
2,5-Dimethylhexane 1.219 0.033 1.245 0.070 0.872 0.062 0.306 0.036 0.388 0.040 0.918 0.049 0.259 0.032 0.331 0.011 0.365 0.010 1.726 0.090
2.4-Dimethylhexane 0.993 0.029 2.571 0.126 0.118 0.029 0.638 0.063 0.348 0.037 0.492 0.051 1.090 0.086 0.397 0.038 0.513 0.018 0.661 0.050 4.849 0.212
2,3,4-Trimethylpentane 2.677 0.046 5.576 0.026 2.468 0.029 0.567 0.024 1.114 0.017 2.161 0.059 7.428 0.039
Toluene 4.026 0.036 7.399 0.055 15.846 0.067 5.559 0.022 11.638 0.107 13.184 0.060 5.182 0.030 4.088 0.025 3.628 0.032 12.576 0.047
2,3,3-Trimethylpentane 2.689 0.054 2.425 0.098 2.457 0.084 1.553 0.110 5.240 0.039
2,3-Dimethylhexane 0.764 0.056 1.800 0.031 0.614 0.022 0.242 0.028 0.327 0.053 0.684 0.054 0.428 0.090 0.412 0.022 1.952 0.032
2-Methylheptane 0.631 0.081 0.490 0.065 0.358 0.033 0.668 0.031 0.527 0.061 0.378 0.043 0.408 0.054 1.147 0.063 2.773 0.033 1.552 0.038
3-Methylheptane 0.449 0.019 0.528 0.033 0.455 0.030 0.363 0.064 0.439 0.058 0.340 0.033 0.310 0.026 1.016 0.054 1.727 0.039 1.883 0.051
trans-1,4-
0.125 0.033 0.169 0.011 0.774 0.017
Dimethylcyclohexane
2,2,5-Trimethylhexane 1.433 0.027 2.319 0.023 0.500 0.015 0.168 0.027 0.189 0.040 1.349 0.046 2.921 0.025
n-Octane 0.399 0.137 0.421 0.005 0.344 0.004 0.889 0.017 0.587 0.041 0.371 0.025 4.533 0.076 1.467 0.009
Ethylbenzene 1.051 0.014 1.342 0.010 3.217 0.032 1.016 0.008 1.961 0.030 2.824 0.034 1.663 0.015 1.133 0.015 0.898 0.006 2.999 0.016
m-Xylene 2.478 0.027 3.926 0.028 7.973 0.174 3.182 0.025 5.331 0.093 6.324 0.085 2.882 0.023 3.817 0.045 2.253 0.011 7.716 0.053
p-Xylene 1.063 0.020 1.671 0.018 5.281 0.144 1.374 0.017 2.341 0.037 2.864 0.042 1.357 0.013 1.437 0.021 0.875 0.006 4.261 0.052
2-Methyloctane 0.183 0.080 0.130 0.065 0.118 0.038 0.571 0.034 0.814 0.055 0.506 0.042
3-Methyloctane 0.209 0.041 0.145 0.043 0.492 0.064 0.926 0.036 0.551 0.026
o-Xylene 1.411 0.017 2.005 0.017 4.883 0.056 1.674 0.014 2.750 0.046 3.693 0.053 2.097 0.019 1.771 0.022 1.062 0.005 4.016 0.020
n-Nonane 0.322 0.022 0.121 0.005 0.409 0.012 0.157 0.010 0.164 0.011 0.200 0.021 3.076 0.033 0.463 0.007
Isopropylbenzene 0.
...