ASTM D512-10

This document is not anASTM standard and is intended only to provide the user of anASTM 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:D512–04 Designation:D512–10
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.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 Department of Defense.
1. 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
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 and health practices and determine the applicability of regulatory
limitations prior to use. For a specific hazard statement, see 26.1.1.
1.4A1.5 A former colorimetric test method was discontinued. Refer to Appendix X1 for historical information.
2. Referenced Documents
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2.1 ASTM Standards:
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D4127 Terminology Used with Ion-Selective Electrodes
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, refer to Terminologies D1129 and D4127.
4. 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-pressureboilersystemsandtostainlesssteel,somonitoringisessentialforpreventionofdamage.Chlorideanalysisiswidely
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.
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These test methods are under the jurisdiction ofASTM Committee D19 on Water and are the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water.
Current edition approved July 1, 2004. Published July 2004. Originally approved in 1938. Last previous edition approved in 1989 as D512 – 89 (1999). DOI:
10.1520/D0512-04.
Current edition approved Sept. 15, 2010. Published November 2010. Originally approved in 1938. Last previous edition approved in 2004 as D512–04. DOI:
10.1520/D0512-10.
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ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.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.
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D512–10
5. Purity of Reagents
5.1 Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform
to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are
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available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use
without lessening the accuracy of the determination.
5.2 Purity of Water— Unless otherwise indicated, references to water shall be understood to mean Type I reagent water
conforming to Specification D1193. Other reagent water types may be used provided it is first ascertained
...