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ASTM D7716-11a(2020)

(Test Method)

Standard Test Method for Determination of Residual Methanol in Glycerin by Gas Chromatography

Standard Test Method for Determination of Residual Methanol in Glycerin by Gas Chromatography

SIGNIFICANCE AND USE
5.1 Methanol content reflects the quality of glycerin for use as an engine coolant. The current specification for the maximum methanol content is 0.1 % weight to weight (w/w).
SCOPE
1.1 This test method provides for the quantitative determination of residual methanol in glycerin by gas chromatography. The range of detection for residual methanol is 0.02 to 0.60 mass %.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

General Information

Status
Published
Publication Date
31-Dec-2019
ICS
71.080.60 - Alcohols. Ethers
75.160.01 - Fuels in general
Technical Committee
D15 - Engine Coolants and Related Fluids
Drafting Committee
D15.04 - Chemical Properties
Current Stage
Ref Project

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ASTM D7716-11a(2020) - Standard Test Method for Determination of Residual Methanol in Glycerin by Gas ChromatographyASTM D7716-11a(2020) - Standard Test Method for Determination of Residual Methanol in Glycerin by Gas Chromatography
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ASTM D7716-11a(2020) - Standard Test Method for Determination of Residual Methanol in Glycerin by Gas Chromatography
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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: D7716 − 11a (Reapproved 2020)
Standard Test Method for
Determination of Residual Methanol in Glycerin by Gas
1
Chromatography
This standard is issued under the fixed designation D7716; 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 3. Terminology
1.1 This test method provides for the quantitative determi- 3.1 Definitions—This test method makes reference to many
nation of residual methanol in glycerin by gas chromatography. common gas chromatographic procedures, terms, and relation-
The range of detection for residual methanol is 0.02 to 0.60 ships. Detailed definitions can be found in Practices E355 and
mass %. E594.
1.2 The values stated in SI units are to be regarded as
4. Summary of Test Method
standard. No other units of measurement are included in this
4.1 The sample is analyzed by headspace gas chromatogra-
standard.
phy. Calibration is achieved by the use of external standards of
1.3 This standard does not purport to address all of the
methanol in water.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety, health, and environmental practices and deter-
5.1 Methanol content reflects the quality of glycerin for use
mine the applicability of regulatory limitations prior to use.
as an engine coolant. The current specification for the maxi-
1.4 This international standard was developed in accor-
mum methanol content is 0.1 % weight to weight (w/w).
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
6. Apparatus
Development of International Standards, Guides and Recom-
6.1 Chromatographic System—See Practice E355 for spe-
mendations issued by the World Trade Organization Technical
cific designations and definitions. The gas chromatograph (GC)
Barriers to Trade (TBT) Committee.
system shall be capable of operating at the conditions given in
Table 1.
2. Referenced Documents
2
6.2 Autosampler system, Gerstel multipurpose sampler
2.1 ASTM Standards:
3
MPS-2 or equivalent. This method can also be run manually.
D1193 Specification for Reagent Water
D7640 Specification for Engine Coolant Grade Glycerin
6.3 Column, open tubular column with polyethylene glycol
E177 Practice for Use of the Terms Precision and Bias in
(PEG) bonded and cross-linked phase internal coating. The
ASTM Test Methods
column should have an upper temperature limit of 260 °C. A
E355 Practice for Gas Chromatography Terms and Relation-
column 30 m in length, with an internal diameter of 0.32 mm,
ships
and a 1.0 μm film thickness has been found satisfactory. Any
E594 Practice for Testing Flame Ionization Detectors Used
column with equivalent or better chromatographic efficiency
in Gas or Supercritical Fluid Chromatography
and selectivity can be used.
E691 Practice for Conducting an Interlaboratory Study to
6.4 Electronic Data Acquisition System—A computer ca-
Determine the Precision of a Test Method
pable of providing real-time graphic and digital presentation of
the chromatographic data is recommended for use. Peak areas
and retention times shall be measured by computer or elec-
1
This test method is under the jurisdiction of ASTM Committee D15 on Engine
tronic integration (integrator).
Coolants and Related Fluids and is the direct responsibility of Subcommittee
D15.04 on Chemical Properties.
Current edition approved Jan. 1, 2020. Published January 2020. Originally
3
approved in 2011. Last previous edition approved in 2011 as D7716–11a. DOI: The sole source of supply of the apparatus known to the committee at this time
10.1520/D7716–11AR20. is GERSTEL GmbH & Co.KG, Eberhard- Gerstel-Platz 1, 45473 Mülheim an der
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Ruhr, Germany. If you are aware of alternative suppliers, please provide this
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM information to ASTM International Headquarters. Your comments will receive
Standards volume information, refer to the standard’s Document Summary page on careful consideration at a meeting of the responsible technical committee, which
the ASTM website. you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7716 − 11a (2020)
TABLE
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