ASTM D512-04

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Designation:D512–04
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* D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications
1.1 These test methods cover the determination of chloride
for Standard Test Methods for Water Analysis
ioninwater,wastewater(TestMethodConly),andbrines.The
E200 Practice for Preparation, Standardization, and Storage
following three test methods are included:
of Standard and Reagent Solutions for Chemical Analysis
Sections
Test Method A (Mercurimetric Titration) 7 to14
3. Terminology
Test Method B (Silver Nitrate Titration) 15 to 21
Test Method C (Ion-Selective Electrode Method) 22 to 29
3.1 Definitions—For definitions of terms used in these test
methods, refer to Terminologies D1129 and D4127.
1.2 TestMethodsA,B,andCwerevalidatedunderPractice
D2777–77,andonlyTestMethodBconformsalsotoPractice
4. Significance and Use
D2777–86. Refer to Sections 14, 21, and 29 for further
4.1 Chloride ion is under regulation in water, and must,
information.
therefore, be measured accurately. It is highly detrimental to
1.3 This standard does not purport to address all of the
high-pressure boiler systems and to stainless steel, so monitor-
safety concerns, if any, associated with its use. It is the
ing is essential for prevention of damage. Chloride analysis is
responsibility of the user of this standard to establish appro-
widelyusedasatoolforestimatingthecyclesofconcentration,
priate safety and health practices and determine the applica-
such as in cooling tower applications. Processing waters and
bility of regulatory limitations prior to use. For a specific
pickling solutions used in the food processing industries also
hazard statement, see 26.1.1.
require dependable methods of analysis for chloride.
1.4 A former colorimetric test method was discontinued.
Refer to Appendix X1 for historical information.
5. Purity of Reagents
2. Referenced Documents 5.1 Reagent grade chemicals shall be used in all tests.
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Unlessotherwiseindicated,itisintendedthatallreagentsshall
2.1 ASTM Standards:
conform to the specifications of the Committee on Analytical
D1066 Practice for Sampling Steam
Reagents of the American Chemical Society, where such
D1129 Terminology Relating to Water
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specifications are available. Other grades may be used, pro-
D1193 Specification for Reagent Water
vided it is first ascertained that the reagent is of sufficiently
D2777 Practice for Determination of Precision and Bias of
high purity to permit its use without lessening the accuracy of
Applicable Test Methods of Committee D19 on Water
the determination.
D3370 Practices for Sampling Water from Closed Conduits
5.2 Purity of Water— Unless otherwise indicated, refer-
D4127 Terminology Used with Ion-Selective Electrodes
ences to water shall be understood to mean Type I reagent
water conforming to Specification D1193. Other reagent water
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These test methods are under the jurisdiction of ASTM Committee D19 on
typesmaybeusedprovideditisfirstascertainedthatthewater
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic
Constituents in Water.
CurrenteditionapprovedJuly1,2004.PublishedJuly2004.Originallyapproved
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in 1938. Last previous edition approved in 1989 as D512 – 89 (1999). DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D0512-04. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
*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.
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D512–04
isofsufficientlyhighpuritytopermititsusewithoutadversely (HNO , sp gr 1.42). Dilute the acidified Hg(NO ) solution
3 3 2
affecting the precision and bias of the test method. Type II with water to 1 L. Filter if necessary, and
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