ASTM D5762-05

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An American National Standard
Designation: D 5762 – 05
Standard Test Method for
Nitrogen in Petroleum and Petroleum Products by Boat-Inlet
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Chemiluminescence
This standard is issued under the fixed designation D 5762; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 3. Summary of Test Method
1.1 This test method covers the determination of nitrogen in 3.1 A hydrocarbon sample is placed on a sample boat at
liquid hydrocarbons, including petroleum process streams and room temperature. The sample and boat are advanced into a
lubricating oils in the concentration range from 40 to 10 000 high-temperature combustion tube where the nitrogen is oxi-
µg/g nitrogen. For light hydrocarbons containing less than 100 dized to nitric oxide (NO) in an oxygen atmosphere. The NO
µg/g nitrogen, Test Method D 4629 can be more appropriate. contacts ozone and is converted to excited nitrogen dioxide
1.2 The values stated in SI units are to be regarded as (NO ). The light emitted as the excited NO decays is detected
2 2
standard. No other units of measurement are included in this by a photomultiplier tube, and the resulting signal is a measure
standard. of the nitrogen contained in the sample.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4.1 Many nitrogen compounds can contaminate refinery
catalysts.Theytendtobethemostdifficultclassofcompounds
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazard to hydrogenate, so the nitrogen content remaining in the
product of a hydrotreator is a measure of the effectiveness of
statements are given in Section 6, 7.1, 8.2, and 8.2.2.
the hydrotreating process. In lubricating oils the concentration
2. Referenced Documents
of nitrogen is a measure of the presence of nitrogen containing
2
2.1 ASTM Standards: additives. This test method is intended for use in plant control
D 4057 Practice for Manual Sampling of Petroleum and and in research.
Petroleum Products
5. Apparatus
D 4177 Practice for Automatic Sampling of Petroleum and
Petroleum Products 5.1 Boat Inlet System, capable of being sealed to the inlet of
the combustion tube and swept with inert gas. The boats are
D 4629 Test Method for Trace Nitrogen in Liquid Petro-
leum Hydrocarbons by Syringe/Inlet Oxidative Combus- fabricated from platinum or quartz. To aid quantitative liquid
injection,addasmallpieceofquartzwooltotheboat.Theboat
tion and Chemiluminescence Detection
D 6299 Practice for Applying SQATechniques to Evaluate drive mechanism should be able to fully insert the boat into the
furnace tube inlet section. A drive mechanism that advances
Analytical System Performance
and withdraws the sample boat into and out of the furnace at a
controlled and repeatable rate is required.
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This test method is under the jurisdiction of ASTM Committee D02 on
5.2 Chemiluminescence Detector, capable of measuring
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
light emitted from the reaction between nitric oxide and ozone,
D02.03 on Elemental Analysis.
and containing a variable attenuation amplifier, integrator, and
Current edition approved May 1, 2005. Published May 2005. Originally
readout.
approved in 1995. Last previous edition approved in 2002 as D 5762–02.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—Detectors designed to maintain the chemiluminescence reac-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tion cell at reduced pressure are acceptable for use and were included in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the instruments used to determine the precision of this test method.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5762–05
FIG. 1 Quartz Combustion Tube (Single-Zone Furnace)
5.3 Combustion Tube, fabricated from quartz. The inlet end 5.5.2 Two-zone tube furnace with temperature controllers
of the tube shall be large enough to accept the sample boat and capable of maintaining the temperature of each furnace zone
to have side arms for introduction of oxygen and inert gas.The independently from 950 to 1050°C (see 5.5). Or two-zone tube
construction is
...