ASTM E2313-22

Standard Test Method for Aldehydes in Mono-, Di-, and Triethylene Glycol (using Spectrophotometry)

SIGNIFICANCE AND USE
5.1 Knowledge of the total aldehyde content of MEG is required to establish whether the product meets the requirements of its quality specifications.
SCOPE
1.1 This test method describes the spectrophotometric determination of total aldehyde content in mono-, di-, and triethylene glycol (MEG, DEG, and TEG). Alkoxyalcohols (hemiacetals), if present, are co-determined, whereas dialkoxyalkanes (acetals), if present, are not. The results provide a measure of the purity of the sample with respect to total aldehyde content.  
1.2 This test method is applicable to samples with total aldehyde concentration (as acetaldehyde) to 50 mg/kg or 35 mg/kg (as formaldehyde). The limit of detection (LOD) is 0.4 mg/kg and the limit of quantitation is 1.2 mg/kg.
Note 1: LOD and LOQ were calculated using the lowest level sample in the ILS.  
1.3 The following applies for the purposes of determining the conformance of the test results using this test method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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. For specific hazard statements, see Section 8 and 7.1.1 – 7.1.6.  
1.6 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-2022
• ICS: 71.040.40 - Chemical analysis
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.14 - Alcohols & Glycols

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: E2313 − 22
Standard Test Method for
Aldehydes in Mono-, Di-, and Triethylene Glycol (using
1
Spectrophotometry)
This standard is issued under the fixed designation E2313; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method describes the spectrophotometric de-
D1193 Specification for Reagent Water
termination of total aldehyde content in mono-, di-, and
D2194 Test Method for Concentration of Formaldehyde
triethylene glycol (MEG, DEG, and TEG). Alkoxyalcohols
Solutions
(hemiacetals), if present, are co-determined, whereas dialkoxy-
D6809 Guide for Quality Control and Quality Assurance
alkanes (acetals), if present, are not. The results provide a
Procedures for Aromatic Hydrocarbons and Related Ma-
measure of the purity of the sample with respect to total
terials
aldehyde content.
E29 Practice for Using Significant Digits in Test Data to
1.2 This test method is applicable to samples with total
Determine Conformance with Specifications
aldehyde concentration (as acetaldehyde) to 50 mg/kg or
E180 Practice for Determining the Precision of ASTM
35 mg⁄kg (as formaldehyde). The limit of detection (LOD) is
Methods for Analysis and Testing of Industrial and Spe-
0.4 mg⁄kg and the limit of quantitation is 1.2 mg/kg. 3
cialty Chemicals (Withdrawn 2009)
E275 Practice for Describing and Measuring Performance of
NOTE 1—LOD and LOQ were calculated using the lowest level sample
in the ILS.
Ultraviolet and Visible Spectrophotometers
E288 Specification for Laboratory Glass Volumetric Flasks
1.3 The following applies for the purposes of determining
E300 Practice for Sampling Industrial Chemicals
the conformance of the test results using this test method to
E969 Specification for Glass Volumetric (Transfer) Pipets
applicable specifications, results shall be rounded off in accor-
E1547 Terminology Relating to Industrial and Specialty
dance with the rounding-off method of Practice E29.
Chemicals
1.4 The values stated in SI units are to be regarded as
2.2 Other Document:
standard. No other units of measurement are included in this
Manufacturer’s Instruction Manual of Spectrophotometer
standard.
3. Terminology
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1 See Terminology E1547 for definitions of terms used in
this test method.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Summary of Test Method
mine the applicability of regulatory limitations prior to use.
For specific hazard statements, see Section 8 and 7.1.1 – 7.1.6. 4.1 The total aldehyde content of the sample is determined
spectrophotometrically.The aldehydes present are reacted with
1.6 This international standard was developed in accor-
excess 3-methyl-2-benzothiazolinone hydrazone (MBTH) to
dance with internationally recognized principles on standard-
form azines. An aqueous solution of iron (III) chloride is
ization established in the Decision on Principles for the
added, causing the oxidation of the excess MBTH to a reactive
Development of International Standards, Guides and Recom-
cation, which reacts with the previously formed azines produc-
mendations issued by the World Trade Organization Technical
ing bluish-green cations.Acetone or methanol is added to stop
Barriers to Trade (TBT) Committee.
the oxidation reaction, to mask the excess MBTH and to obtain
1 2
This test method is under the jurisdiction of ASTM Committee D16 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi- contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
bility of Subcommittee D16.14 on Alcohols & Glycols. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2022. Published September 2022. Originally the ASTM website.
3
approved in 2003. Last previous edition approved in 2021 as E2313 – 21a. DOI: The last approved version of this historical standard is referenced on
10.1520/E2313-22. www.astm.org.
*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
1

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...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2313 − 21a E2313 − 22
Standard Test Method for
Aldehydes in Mono-, Di-, and Triethylene Glycol (using
1
Spectrophotometry)
This standard is issued under the fixed designation E2313; 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*
1.1 This test method describes the spectrophotometric determination of total aldehyde content in mono-, di-, and triethylene glycol
(MEG, DEG, and TEG). Alkoxyalcohols (hemiacetals), if present, are co-determined, whereas dialkoxyalkanes (acetals), if
present, are not. The results provide a measure of the purity of the sample with respect to total aldehyde content.
1.2 This test method is applicable to samples with total aldehyde concentration (as acetaldehyde) to 50 mg/kg or 35 mg ⁄kg (as
formaldehyde). The limit of detection (LOD) is 0.4 mg ⁄kg and the limit of quantitation is 1.2 mg/kg.
NOTE 1—LOD and LOQ were calculated using the lowest level sample in the ILS.
1.3 The following applies for the purposes of determining the conformance of the test results using this test method to applicable
specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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. For specific hazard statements, see Section 8 and 7.1.1 – 7.1.6.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D2194 Test Method for Concentration of Formaldehyde Solutions
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility of
Subcommittee D16.14 on Alcohols & Glycols.
Current edition approved Nov. 1, 2021Sept. 1, 2022. Published December 2021September 2022. Originally approved in 2003. Last previous edition approved in 2021 as
E2313 – 21.E2313 – 21a. DOI: 10.1520/E2313-21A.10.1520/E2313-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1

---------------------- Page: 1 ----------------------
E2313 − 22
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
E288 Specification for Laboratory Glass Volumetric Flasks
E300 Practice for Sampling Industrial Chemicals
E969 Specification for Glass Volumetric (Transfer) Pipets
E1547 Terminology Relating to Industrial and Specialty Chemicals
2.2 Other Document:
Manufacturer’s Instruction Manual of Spectrophotometer
3. Terminology
3.1 See Terminology E1547 for definitions of terms used in this test method.
4. Summary of Test Method
4.1 The total aldehyde content of the sample is determined spectrophotometrically. The aldehydes present are reacted with excess
3-methyl-2-benzothiazolinone hydrazone (MBTH) to form azines. An aqueous solution of iron (III) chloride is added, causing the
oxidation of the excess MBTH to a reactive cation, which reacts with the previously formed azines producing bluish-green c
...