ASTM D1364-22

Standard Test Method for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)

SIGNIFICANCE AND USE
5.1 Volatile solvents are used in a variety of chemical processes which may be affected by water. Therefore, this test method provides a test procedure for assessing compliance with a specification.
SCOPE
1.1 This test method covers the determination of water in volatile solvents and chemical intermediates used in paint, varnish, lacquer, and related products.  
1.2 This test method is not applicable in the presence of mercaptans, peroxides, or appreciable quantities of aldehydes or amines.  
1.3 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, 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 For hazard information and guidance, see the supplier’s Material Safety Data sheet.  
1.6 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.  
1.7 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-2021
• ICS: 87.060.30 - Solvents
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.35 - Solvents, Plasticizers, and Chemical Intermediates

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: D1364 − 22
Standard Test Method for
Water in Volatile Solvents (Karl Fischer Reagent Titration
1
Method)
This standard is issued under the fixed designation D1364; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the determination of water in
D1500Test Method forASTM Color of Petroleum Products
volatile solvents and chemical intermediates used in paint,
(ASTM Color Scale)
varnish, lacquer, and related products.
E29Practice for Using Significant Digits in Test Data to
1.2 This test method is not applicable in the presence of
Determine Conformance with Specifications
mercaptans, peroxides, or appreciable quantities of aldehydes
3. Terminology
or amines.
3.1 Definitions of Terms Specific to This Standard:
1.3 For purposes of determining conformance of an ob-
3.1.1 instrumental end point, n—that point in the titration
served or a calculated value using this test method to relevant
whentwosmallplatinumelectrodes,uponwhichapotentialof
specifications, test result(s) shall be rounded off “to the nearest
20 to 50 mV has been impressed, are depolarized by the
unit” in the last right-hand digit used in expressing the
addition of 0.05 mLof Karl Fischer reagent (6 mg of H O per
2
specificationlimit,inaccordancewiththerounding-offmethod
mL), causing a change of current flow of 10 to 20 µA that
of Practice E29.
persists for at least 30 s.
1.4 The values stated in SI units are to be regarded as
NOTE1—Thisendpointissometimesincorrectlycalledthe“deadstop”
which is the reverse of the above.
standard. No other units of measurement are included in this
standard. 3.1.2 color end point, n—during the titration, the solution
first turns yellow, then later deepens towards the end of the
1.5 For hazard information and guidance, see the supplier’s
titration; the end point is indicated by the change from yellow
Material Safety Data sheet.
to orange-red which is quite sharp and easily repeated; the
orange-red color must persist for at least 30 s in order to
1.6 This standard does not purport to address all of the
indicate an end point.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 2—View the color by transmitted daylight or by transmitted light
priate safety, health, and environmental practices and deter- from an artificial daylight lamp, such as the one that complies with the
specifications given in Test Method D1500.
mine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accor-
4. Summary of Test Method
dance with internationally recognized principles on standard-
4.1 This test method is based essentially upon the reduction
ization established in the Decision on Principles for the
of iodine by sulfur dioxide in the presence of water. This
Development of International Standards, Guides and Recom-
reaction can be used quantitatively only when pyridine and an
mendations issued by the World Trade Organization Technical
alcohol are present to react with the sulfur trioxide and
Barriers to Trade (TBT) Committee.
hydriodic acid produced according to the following reactions:
H O1I 1SO 13C H N→2C H N·HI1C H N·SO (1)
2 2 2 5 5 5 5 5 5 3
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint C H N·SO 1ROH→C H N·HSO R
5 5 3 5 5 4
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
2
Current edition approved Jan. 1, 2022. Published January 2022. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1955. Last previous edition approved in 2012 as D1364–02 (2012) contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
which was withdrawn January 2021 and reinstated in January 2022. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D1364-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D1364 − 22
mixture.Itisdesirabletohaveameansforcoolingthetitration
vessel to ice temperature.
6.2 Instrument Electrodes—Platinu
...