ASTM D512-23

Standard Test Methods for Chloride Ion In Water

SIGNIFICANCE AND USE
4.1 Chloride ion is under regulation in waste water, and must, therefore, be measured accurately. It is highly detrimental to high-pressure boiler systems and to stainless steel, so monitoring is essential for prevention of damage. Chloride analysis is widely used as a tool for estimating the cycles of concentration, such as in cooling tower applications. Processing waters and pickling solutions used in the food processing industries also require dependable methods of analysis for chloride.
SCOPE
1.1 These test methods cover the determination of chloride ion in water, wastewater (Test Method C only), and brines. The following three test methods are included:    
Sections    
Test Method A (Mercurimetric Titration)  
7 to14  
Test Method B (Silver Nitrate Titration)  
15 to 21  
Test Method C (Ion-Selective Electrode Method)  
22 to 29  
1.2 Test Methods A, B, and C were validated under Practice D2777 – 77, and only Test Method B conforms also to Practice D2777 – 86. Refer to Sections 14, 21, and 29 for further information.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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. For a specific hazard statement, see 26.1.1.  
1.5 A former colorimetric test method was discontinued. Refer to Appendix X1 for historical information.  
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-Mar-2023
• ICS: 13.060.50 - Examination of water for chemical substances
• Technical Committee: D19 - Water
• Drafting Committee: D19.05 - Inorganic Constituents in Water

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: D512 − 23
Standard Test Methods for
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Chloride Ion In Water
This standard is issued under the fixed designation D512; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
1.1 These test methods cover the determination of chloride
D2777 Practice for Determination of Precision and Bias of
ion in water, wastewater (Test Method C only), and brines. The
Applicable Test Methods of Committee D19 on Water
following three test methods are included:
D3370 Practices for Sampling Water from Flowing Process
Sections
Streams
Test Method A (Mercurimetric Titration) 7 to14
D4127 Terminology Used with Ion-Selective Electrodes
Test Method B (Silver Nitrate Titration) 15 to 21
D5810 Guide for Spiking into Aqueous Samples
Test Method C (Ion-Selective Electrode Method) 22 to 29
D5847 Practice for Writing Quality Control Specifications
1.2 Test Methods A, B, and C were validated under Practice
for Standard Test Methods for Water Analysis
D2777 – 77, and only Test Method B conforms also to Practice
E200 Practice for Preparation, Standardization, and Storage
D2777 – 86. Refer to Sections 14, 21, and 29 for further
of Standard and Reagent Solutions for Chemical Analysis
information.
1.3 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions—For definitions of terms used in these test
standard.
methods, refer to Terminologies D1129 and D4127.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 Chloride ion is under regulation in waste water, and
priate safety, health, and environmental practices and deter-
must, therefore, be measured accurately. It is highly detrimen-
mine the applicability of regulatory limitations prior to use.
tal to high-pressure boiler systems and to stainless steel, so
For a specific hazard statement, see 26.1.1.
monitoring is essential for prevention of damage. Chloride
1.5 A former colorimetric test method was discontinued.
analysis is widely used as a tool for estimating the cycles of
Refer to Appendix X1 for historical information.
concentration, such as in cooling tower applications. Process-
ing waters and pickling solutions used in the food processing
1.6 This international standard was developed in accor-
industries also require dependable methods of analysis for
dance with internationally recognized principles on standard-
chloride.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Purity of Reagents
mendations issued by the World Trade Organization Technical
5.1 Reagent grade chemicals shall be used in all tests.
Barriers to Trade (TBT) Committee.
Unless otherwise indicated, it is intended that all reagents shall
2. Referenced Documents
conform to the specifications of the Committee on Analytical
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Reagents of the American Chemical Society, where such
2.1 ASTM Standards:
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D1066 Practice for Sampling Steam specifications are available. Other grades may be used, pro-
vided it is first ascertained that the reagent is of sufficiently
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These test methods are under the jurisdiction of ASTM Committee D19 on high purity to permit its use without lessening the accuracy of
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic
the determination.
Constituents in Water.
Current edition approved April 1, 2023. Published April 2023. Originally
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approved in 1938. Last previous edition approved in 2012 as D512 – 12 which was ACS Reagent Chemicals, Specifications and Procedures for Reagents and
withdrawn July 2021 and reinstated in April 2023. DOI: 10.1520/D0512-23. Standard-Grade Reference Materials, American Chemical Society, Washington,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or DC. For suggestions on the testing of reagents not listed by the American Chemical
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
Standards volume information, refer to the standard’s Document Summary page on U.K., and the United States Phar
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