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ASTM D7399-08

(Test Method)

Standard Test Method for Determination of the Amount of Polypropylene (PP) in Polypropylene/LDPE Mixtures Using Infrared Spectrophotometer (FTIR) (Withdrawn 2017)

Standard Test Method for Determination of the Amount of Polypropylene (PP) in Polypropylene/LDPE Mixtures Using Infrared Spectrophotometer (FTIR) (Withdrawn 2017)

SIGNIFICANCE AND USE
In recycling PP and LDPE, it is important to the end product properties as well as to the processing conditions to know what the purity of the mixture is. In many cases, it is vital to know that the recycled material is reasonably free of a contaminant.
SCOPE
1.1 This test method uses an infrared approach for determining the presence of polypropylene (PP) physically mixed in with low density polyethylene – usually for recycling purposes.
Note 1—Quantitative determinations require several standard mixtures in the concentration range of interest and well defined baseline anchoring points.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 2—There is no known ISO equivalent to this standard.
WITHDRAWN RATIONALE
This test method uses an infrared approach for determining the presence of polypropylene (PP) physically mixed in with low density polyethylene—usually for recycling purposes.
Formerly under the jurisdiction of Committee D20 on Plastics, this standard was withdrawn in February 2017 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

Status
Historical
Publication Date
31-Aug-2008
Withdrawal Date
16-Feb-2017
ICS
83.080.20 - Thermoplastic materials
Technical Committee
D20 - Plastics
Drafting Committee
D20.70 - Analytical Methods
Current Stage
Ref Project

Relations

Replaced By
ASTM D7399-18 - Standard Test Method for Determination of the Amount of Polypropylene in Polypropylene/Low Density Polyethylene Mixtures Using Infrared Spectrophotometry
Effective Date
01-Apr-2018
Referred By
ASTM F3390-20 - Standard Specification for 3 through 24 in. Lined Flexible Corrugated Polyethylene Pipe for Land Drainage Applications
Effective Date
01-Sep-2008
Referred By
ASTM F2306/F2306M-21 - Standard Specification for 300 mm to 1500 mm [12 in. to 60 in.] Annular Corrugated Profile-Wall Polyethylene (PE) Pipe and Fittings for Non-Pressure Gravity-Flow Storm Sewer and Subsurface Drainage Applications
Effective Date
01-Sep-2008
Referred By
ASTM F2947/F2947M-21a - Standard Specification for 150 to 1500 mm [6 to 60 in.] Annular Corrugated Profile-Wall Polyethylene (PE) Pipe and Fittings for Sanitary Sewer Applications
Effective Date
01-Sep-2008
Referred By
ASTM F2648/F2648M-23 - Standard Specification for 50 mm to 1500 mm [2 in. to 60 in.] Annular Corrugated Profile Wall Polyethylene (PE) Pipe and Fittings for Land Drainage Applications
Effective Date
01-Sep-2008

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ASTM D7399-08 - Standard Test Method for Determination of the Amount of Polypropylene (PP) in Polypropylene/LDPE Mixtures Using Infrared Spectrophotometer (FTIR) (Withdrawn 2017)ASTM D7399-08 - Standard Test Method for Determination of the Amount of Polypropylene (PP) in Polypropylene/LDPE Mixtures Using Infrared Spectrophotometer (FTIR) (Withdrawn 2017)
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ASTM D7399-08 - Standard Test Method for Determination of the Amount of Polypropylene (PP) in Polypropylene/LDPE Mixtures Using Infrared Spectrophotometer (FTIR) (Withdrawn 2017)
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7399 − 08
Standard Test Method for
Determination of the Amount of Polypropylene (PP) in
Polypropylene/LDPE Mixtures Using Infrared
1
Spectrophotometer (FTIR)
This standard is issued under the fixed designation D7399; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope eters: Level Zero and Level One Tests
IEEE/ASTM SI-10Standard for Use of the International
1.1 This test method uses an infrared approach for deter-
System of Units (SI): The Modern Metric System
miningthepresenceofpolypropylene(PP)physicallymixedin
withlowdensitypolyethylene–usuallyforrecyclingpurposes.
3. Terminology
NOTE1—Quantitativedeterminationsrequireseveralstandardmixtures
3.1 Definitions—For definitions of plastics terms used in
in the concentration range of interest and well defined baseline anchoring
points.
thistestmethod,seeTerminologystandardsD883,D1600,and
D5033.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2 Terminology—Units,symbols,andabbreviationsusedin
responsibility of the user of this standard to establish appro-
this test method appear in Terminology E131 or IEEE/ASTM
priate safety and health practices and determine the applica-
SI-10.
bility of regulatory limitations prior to use.
NOTE 2—There is no known ISO equivalent to this standard. 4. Summary of Test Method
4.1 Thin films representing a typical portion of the material
2. Referenced Documents
are analyzed with an IR spectrophotometer using two absor-
2
2.1 ASTM Standards:
bance bands—one characteristic for polypropylene (PP) and
D883Terminology Relating to Plastics
one for low density polyethylene (LDPE). The ratio of these
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
two absorbencies is used to assess the presence of polypropyl-
tics
ene.
D2238TestMethodsforAbsorbanceofPolyethyleneDueto
−1
Methyl Groups at 1378 cm 4.2 For quantitative determinations, several standards with
known concentrations of PP in LDPE bracketing the range of
D5033GuideforDevelopmentofASTMStandardsRelating
to Recycling and Use of Recycled Plastics (Withdrawn interest are needed to develop a calibration curve. Also,
3
baseline placement shall be defined to produce repeatable
2007)
E131Terminology Relating to Molecular Spectroscopy results.
E168Practices for General Techniques of Infrared Quanti-
tative Analysis 5. Significance and Use
E932PracticeforDescribingandMeasuringPerformanceof
5.1 In recycling PP and LDPE, it is important to the end
Dispersive Infrared Spectrometers
product properties as well as to the processing conditions to
E1421Practice for Describing and Measuring Performance
knowwhatthepurityofthemixtureis.Inmanycases,itisvital
of Fourier Transform Mid-Infrared (FT-MIR) Spectrom-
to know that the recycled material is reasonably free of a
contaminant.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
and is the direct responsibility of Subcommittee D20.70 on Analytical Methods.
6. Interferences
Current edition approved Sept. 1, 2008. Published September 2008. DOI:
10.1520/D7399-08.
6.1 PresenceofmaterialsotherthanPPorLDPEinasample
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
might cause error in measurement.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
6.2 Inhomogeneoussampleisknowntocausefalsereading.
the ASTM website.
3
Itisrecommendedtoverifysamplehomogeneitybymeasuring
The last approved version of this historical standard is referenced on
www.astm.org. different areas of the sample.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7399 − 08
NOTE 6—There is a valley between these two peaks. If preferred, draw
7. Apparatus
baseline for individual peak.
7.1 Infrared Spectrophotometer, either double beam or a
9.4 Several standards with known concentrations of PP are
Fourier transform (FTIR).
needed to develop a calibration curve. The absorbance ratio of
7.1.1 Double-Beam Infrared Spectrophotometer, capable of
-1 -1
-1 1373cm versus1465cm isplottedagainstPPconcentration
a4cm spectral resolution as defined in Practice E932. The
fromwhichthePPcontentoftheunknownsampleisobtained.
instrument shall be capable of scale expansion along the
Use the average of three measurements for calibration curve.
wavelength axis.
(See Fig. 1)
7.1.2 Fourier Transform Infrared Spectrometer,capableof4
-1
cm resolution. The instrume
...

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