ASTM D7828-12

Standard Test Method for Determination of Residue Composition in Liquefied Petroleum Gas (LPG) Using Automated Thermal Desorption/Gas Chromatography (ATD/GC) (Withdrawn 2021)

SIGNIFICANCE AND USE
5.1 Residue in LPG is a contaminant that can lead to operational problems in some end use applications. Engines, micro-turbines, fuel cells and other equipment may be sensitive to residue levels as low as 10 mg/kg.  
5.2 Contamination of LPG can occur during production, transport, delivery, storage and use. A qualitative indication of the contaminants can help track down the source of the contamination from manufacture, through the distribution system, and to the end user.  
5.3 This test method is designed to provide a lower detection limit, wider dynamic range, and better accuracy than gravimetric methods like Test Method D2158.  
5.4 This test method can be performed with little or no discharge of LPG vapors, compared to Test Method D2158 which requires evaporation of 100 mL of sample per test.  
5.5 Sampling for residue in LPG using sorbent tubes can be performed in the field, and the sorbent tubes sent to a laboratory for analysis. This saves significant costs in shipping (weight of tube is approximately 10 grams), and is much safer and easier than transporting LPG cylinders.  
5.6 This test method determines total residues from C6 to C40, compared to a thermal gravimetric residue method such as Test Method D2158 which heat the residue to 38°C, resulting in a lower recovery due to loss of lighter residue components.  
5.7 If there is a need to decrease the detection limit of residue or individual compounds of interest below 10 µg/g, the procedures in this test method can be modified to achieve 50 times enhanced detection limit, or 0.2 µg/g.
SCOPE
1.1 This test method covers the determination of residue in LPG by automated thermal desorption/gas chromatography (ATD/GC) using flame ionization detection (FID).  
1.2 The quantitation of residue covers a component boiling point range from 69°C to 522°C, equivalent to the boiling points of C6 through C40 n-paraffins.  
1.2.1 The boiling range covers possible LPG contaminants such as gasoline, diesel fuel, phthalates and compressor oil. Qualitative information on the nature of the residue can be obtained from this test method.  
1.2.2 Materials insoluble in LPG and components which do not elute from the gas chromatograph or which have no response in a flame ionization detector are not determined.  
1.2.3 The reporting limit (or limit of quantitation) for total residue is 6.7 µg/g.  
1.2.4 The dynamic range of residue quantitation is 6.7 to 3300 µg/g.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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.
WITHDRAWN RATIONALE
This test method covered the determination of residue in LPG by automated thermal desorption/gas chromatography (ATD/GC) using flame ionization detection (FID).
Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in January 2021 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: Withdrawn
• Publication Date: 31-Oct-2012
• Withdrawal Date: 20-Jan-2021
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.H0 - Liquefied Petroleum Gas

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:D7828 −12
Standard Test Method for
Determination of Residue Composition in Liquefied
Petroleum Gas (LPG) Using Automated Thermal Desorption/
1
Gas Chromatography (ATD/GC)
This standard is issued under the fixed designation D7828; 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 D1835Specification for Liquefied Petroleum (LP) Gases
D2158Test Method for Residues in Liquefied Petroleum
1.1 This test method covers the determination of residue in
(LP) Gases
LPG by automated thermal desorption/gas chromatography
D3700Practice for Obtaining LPG Samples Using a Float-
(ATD/GC) using flame ionization detection (FID).
ing Piston Cylinder
1.2 The quantitation of residue covers a component boiling
D6299Practice for Applying Statistical Quality Assurance
point range from 69°C to 522°C, equivalent to the boiling
and Control Charting Techniques to Evaluate Analytical
points of C through C n-paraffins.
6 40
Measurement System Performance
1.2.1 The boiling range covers possible LPG contaminants
E355PracticeforGasChromatographyTermsandRelation-
such as gasoline, diesel fuel, phthalates and compressor oil.
ships
3
Qualitative information on the nature of the residue can be
2.2 Environmental Protection Agency:
obtained from this test method.
EPAMethodTO-17DeterminationofVolatileOrganicCom-
1.2.2 Materials insoluble in LPG and components which do
pounds in Ambient Air using Active Sampling onto
not elute from the gas chromatograph or which have no
Sorbent Tubes
response in a flame ionization detector are not determined.
3. Terminology
1.2.3 The reporting limit (or limit of quantitation) for total
residue is 6.7 µg/g.
3.1 Definitions:
1.2.4 The dynamic range of residue quantitation is 6.7 to
3.1.1 Forthedefinitionsofcommonchromatographicterms,
3300 µg/g.
refer to Practice E355.
1.3 The values stated in SI units are to be regarded as 3.1.2 quality control sample, QC sample, n—for use in
quality assurance program to determine and monitor the
standard. No other units of measurement are included in this
precision and stability of a measurement system; a stable and
standard.
homogenous material having physical or chemical properties,
1.4 This standard does not purport to address all of the
or both, similar to those of typical samples tested by the
safety concerns, if any, associated with its use. It is the
analyticalmeasurementsystem.Thematerialisproperlystored
responsibility of the user of this standard to establish appro-
toensuresampleintegrity,andisavailableinsufficientquantity
priate safety and health practices and determine the applica-
for repeated long-term testing. D6299
bility of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 residue, n—soluble contaminants in LPG with boiling
2
pointsfrom69°Cto522°C,coveringtheboilingpointrangeof
2.1 ASTM Standards:
C to C n-paraffins.
D1265Practice for Sampling Liquefied Petroleum (LP) 6 40
Gases, Manual Method
3.2.2 sorbent tube, n—a tube that contains commercially
availableadsorbentswhosecompositionisspecifictoretainthe
components of interest (residues).
1
This test method is under the jurisdiction of ASTM Committee D02 on
3.2.3 thermal desorber, n—a sample introduction technique
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.H0 on Liquefied Petroleum Gas. used in gas chromatography in which residue adsorbed on an
Current edition approved Nov. 1, 2012. Published March 2013. DOI: 10.1520/
adsorbent material is desorbed into a gas chromatograph.
D7828-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from United States Environmental Protection Agency (EPA), Ariel
Standards volume information, refer to the standard’s Document Summary page on Rios Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20460, http://
the ASTM website. www.epa.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7828−12
3.2.3.1 Discussion—Figs. 1-3 illustrate the flow path and standardspreviouslyanalyzed,isappliedtothesample,andthe
function of the thermal desorber used in this test method. mass of residue in the sample is calculated.
3.2.4 thermal desorption, n—the process of using heat,
5. Significance and Use
temperature, gas flow and time to remove adsorbed compo-
5.1 Residue in LPG is a contaminant that can lead to
nents captured in a s
...