ASTM D7515-19(2023)

Standard Test Method for Purity of 1,3-Propanediol (Gas Chromatographic Method)

SIGNIFICANCE AND USE
4.1 Knowledge of an approved method is required to establish whether the product meets the requirements of its specifications. The use of glycols in the reference sample is not intended to suggest the presence of glycol (EG, PG and DPG) impurities, but to demonstrate and quantify the separation of commonly used Engine Coolant glycols from PDO.
SCOPE
1.1 This test method describes the gas chromatographic determination of purity for 1,3-propanediol (PDO). This test method was originally developed to determine the purity of 1,3-propanediol used for the application as the freeze point depressant base fluid in formulated PDO engine coolants. Use of the method for purity of PDO for other applications may be viable.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exception—Inch-pound units (psi) are used in Table 1, Pressure Program, Options A and B.  
1.3 Review the current Material Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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-Aug-2023
• ICS: 71.040.50 - Physicochemical methods of analysis
• Technical Committee: D15 - Engine Coolants and Related Fluids
• Drafting Committee: D15.04 - Chemical Properties

Standards Content (Sample)

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: D7515 − 19 (Reapproved 2023)
Standard Test Method for
1
Purity of 1,3-Propanediol (Gas Chromatographic Method)
This standard is issued under the fixed designation D7515; 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 D1123 Test Methods for Water in Engine Coolant Concen-
trate by the Karl Fischer Reagent Method
1.1 This test method describes the gas chromatographic
E177 Practice for Use of the Terms Precision and Bias in
determination of purity for 1,3-propanediol (PDO). This test
ASTM Test Methods
method was originally developed to determine the purity of
E300 Practice for Sampling Industrial Chemicals
1,3-propanediol used for the application as the freeze point
E691 Practice for Conducting an Interlaboratory Study to
depressant base fluid in formulated PDO engine coolants. Use
Determine the Precision of a Test Method
of the method for purity of PDO for other applications may be
E2409 Test Method for Glycol Impurities in Mono-, Di-, Tri-
viable.
and Tetraethylene Glycol and in Mono- and Dipropylene
1.2 The values stated in SI units are to be regarded as
Glycol (Gas Chromatographic Method)
standard. No other units of measurement are included in this
standard.
3. Summary of Test Method
1.2.1 Exception—Inch-pound units (psi) are used in Table 1,
3.1 The sample is analyzed by a temperature-programmed
Pressure Program, Options A and B.
gas chromatograph, equipped with a capillary column and
1.3 Review the current Material Safety Data Sheets (MSDS)
flame ionization detector (FID), and quantification is per-
for detailed information concerning toxicity, first aid
formed by direct area normalization.
procedures, and safety precautions.
3.2 Additionally, the use of a reference sample using
1.4 This standard does not purport to address all of the
Ethylene, Propylene, or Dipropylene Glycol (EG, PG or DPG)
safety concerns, if any, associated with its use. It is the
in 1,3-PDO (minimum purity 99.5 %) should be used as a
responsibility of the user of this standard to establish appro-
performance check (see Section 8).
priate safety, health, and environmental practices and deter-
NOTE 1—The application of this reference sample is also used to
mine the applicability of regulatory limitations prior to use.
demonstrate the separation of commonly used glycols (EG, PG and DPG)
1.5 This international standard was developed in accor- in engine coolants, from PDO. Solutions of EG, PG, or DPG in
concentrations of 0.1 to not more than 1 % may be used.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. Significance and Use
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4.1 Knowledge of an approved method is required to
Barriers to Trade (TBT) Committee.
establish whether the product meets the requirements of its
specifications. The use of glycols in the reference sample is not
2. Referenced Documents
intended to suggest the presence of glycol (EG, PG and DPG)
2
2.1 ASTM Standards: impurities, but to demonstrate and quantify the separation of
commonly used Engine Coolant glycols from PDO.
1
This test method is under the jurisdiction of ASTM Committee D15 on Engine
5. Apparatus
Coolants and Related Fluids and is the direct responsibility of Subcommittee
D15.04 on Chemical Properties.
5.1 Gas Chromatograph(s)—provided with a sample splitter
Current edition approved Sept. 1, 2023. Published September 2023. Originally
or on-column injection, flame ionization detector and
approved in 2009. Last previous edition approved in 2019 as D7515 – 19. DOI:
10.1520/D7515–19R23.
temperature-programming facilities. The instrument must be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
suitable for analysis according to the operating instructions
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
given in Table 1. To account for differences among laboratory
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. equipment, the two most common column choices are listed.
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D7515 − 19 (2023)
TABLE 1 Typical Operating Parameters for the GC Analysis of PDO
A B
Column Option A
...