ASTM E1064-23
(Test Method)Standard Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration
Standard Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration
SIGNIFICANCE AND USE
4.1 The coulometric technique is especially suited for determining low concentrations of water in organic liquids that would yield small titers by the Karl Fischer volumetric procedure. The precision and accuracy of the coulometric technique decreases for concentrations of water much greater than 2.0 % because of the difficulty in measuring the small size of sample required. The test method assumes 100 % efficiency of coulombs in iodine production. Provision is made for verifying this efficiency. (See Table 1 and Note 5.)
SCOPE
1.1 This test method covers the determination of water from 0 % to 2.0 % mass in most liquid organic chemicals, with Karl Fischer reagent, using an automated coulometric titration procedure. Use of this test method is not applicable for liquefied gas products such as Liquid Petroleum Gas (LPG), Butane, Propane, Liquid Natural Gas (LNG), etc.
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 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.
1.4 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in Section 8.
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.
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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: E1064 − 23
Standard Test Method for
Water in Organic Liquids by Coulometric Karl Fischer
1
Titration
This standard is issued under the fixed designation E1064; 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* D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the determination of water from
terials
0 % to 2.0 % mass in most liquid organic chemicals, with Karl
E180 Practice for Determining the Precision of ASTM
Fischer reagent, using an automated coulometric titration
Methods for Analysis and Testing of Industrial and Spe-
procedure. Use of this test method is not applicable for
3
cialty Chemicals (Withdrawn 2009)
liquefied gas products such as Liquid Petroleum Gas (LPG),
E203 Test Method for Water Using Volumetric Karl Fischer
Butane, Propane, Liquid Natural Gas (LNG), etc.
Titration
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3. Summary of Test Method
standard.
3.1 This test method is based on the Karl Fischer reaction
1.3 Review the current Safety Data Sheets (SDS) for de-
for determining water—the reduction of iodine by sulfur
tailed information concerning toxicity, first-aid procedures,
dioxide in the presence of water to form sulfur trioxide and
handling, and safety precautions.
hydriodic acid. The reaction becomes quantitative only when
1.4 This standard does not purport to address all of the pyridine or other organic base and methanol or other alcohol
are present. Unlike the volumetric Karl Fischer reagents that
safety problems, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- include iodine, the coulometric technique electrolytically gen-
erates iodine, with 10.71 C of generating current corresponding
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. to 1 mg of water in accordance with Faraday’s law.
Specific precautionary statements are given in Section 8.
4. Significance and Use
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.1 The coulometric technique is especially suited for de-
ization established in the Decision on Principles for the
termining low concentrations of water in organic liquids that
Development of International Standards, Guides and Recom-
would yield small titers by the Karl Fischer volumetric
mendations issued by the World Trade Organization Technical
procedure. The precision and accuracy of the coulometric
Barriers to Trade (TBT) Committee.
technique decreases for concentrations of water much greater
than 2.0 % because of the difficulty in measuring the small size
2. Referenced Documents
of sample required. The test method assumes 100 % efficiency
2
of coulombs in iodine production. Provision is made for
2.1 ASTM Standards:
verifying this efficiency. (See Table 1 and Note 5.)
D1193 Specification for Reagent Water
D4672 Test Method for Polyurethane Raw Materials: Deter-
5. Interferences
mination of Water Content of Polyols
5.1 Interfering substances are the same as are encountered
in the volumetric Karl Fischer titration. A detailed discussion
1
of interfering substances can be found in the treatise on
This test method is under the jurisdiction of ASTM Committee D16 on
4
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
“Aquametry.”
bility of Subcommittee D16.04 on Instrumental Analysis.
Current edition approved July 15, 2023. Published August 2023. Originally
approved in 1985. Last previous edition approved in 2016 as E1064 – 16. DOI:
3
10.1520/E1064-23. The last approved version of this historical standard is referenced on
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.astm.org.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM J. Mitchell, Jr. and D. M. Smith, “Aquametry”—A Treatise on Methods for the
Standards volume information, refer to the standard’s Document Summary page on Determination of Water, Part III—The Karl Fischer Reagent, 2nd Ed., J. Wiley and
the ASTM website. Sons, Inc., New York, NY 1990.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohock
...
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: E1064 − 16 E1064 − 23
Standard Test Method for
Water in Organic Liquids by Coulometric Karl Fischer
1
Titration
This standard is issued under the fixed designation E1064; 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 covers the determination of water from 00 % to 2.0 % mass in most liquid organic chemicals, with Karl
Fischer reagent, using an automated coulometric titration procedure. Use of this test method is not applicable for liquefied gas
products such as Liquid Petroleum Gas (LPG), Butane, Propane, Liquid Natural Gas (LNG), etc.
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 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and
safety precautions.
1.4 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in Section 8.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D4672 Test Method for Polyurethane Raw Materials: Determination of Water Content of Polyols
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E203 Test Method for Water Using Volumetric Karl Fischer Titration
3. Summary of Test Method
3.1 This test method is based on the Karl Fischer reaction for determining water—the reduction of iodine by sulfur dioxide in the
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 D16.04 on Instrumental Analysis.
Current edition approved April 1, 2016July 15, 2023. Published May 2016August 2023. Originally approved in 1985. Last previous edition approved in 20122016 as
E1064 – 12.E1064 – 16. DOI: 10.1520/E1064-16.10.1520/E1064-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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 the ASTM website.
3
The last approved version of this historical standard is referenced on 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
---------------------- Page: 1 ----------------------
E1064 − 23
presence of water to form sulfur trioxide and hydriodic acid. The reaction becomes quantitative only when pyridine or other
organic base and methanol or other alcohol are present. Unlike the volumetric Karl Fischer reagents that include iodine, the
coulometric technique electrolytically generates iodine, with 10.71 C of generating current corresponding to 1 mg of water in
accordance with Faraday’s law.
4. Significance and Use
4.1 The coulometric technique is especially suited for determining low concentrations of water in organic liquids that would yield
small titers by the Karl Fischer volumetric procedure. The precision and accuracy of the coulometric technique decreases for
concentrations of water much greater than 2.0 % because of the difficulty in measuring the small size of sample required. The test
method assumes 100 % efficiency of coulombs in iodine production. Provision is made for verifying this efficiency. (See
TableTable 1 1 and Note 5Note 5.).)
5. Interferences
5.1 Interfering substances are the same as are encountered in the volumetric Karl Fischer titration. A d
...
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