ASTM D511-08

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:D 511–03 Designation:D511–08
Standard Test Methods for
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Calcium and Magnesium In Water
This standard is issued under the fixed designation D 511; 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 Department of Defense.
1. Scope *
1.1 These test methods cover the determination of calcium and magnesium in water by complexometric titration and atomic
absorption spectrometric procedures. Two test methods are included, as follows:
Sections
Test Method A—Complexometric Titration 7to14
Test Method B—Atomic Absorption Spectrometric 15 to 23
1.2
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 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. Specific hazard statements are given in 12.2.6 and 20.6.
2. Referenced Documents
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2.1 ASTM Standards:
D 1129 Terminology Relating to Water
D 1193 Specification for Reagent Water
D 2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D 3370 Practices for Sampling Water from Closed Conduits
D 4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D 4841 Practice for Estimation of Holding TimesTime for Water Samples Containing Organic and Inorganic Constituents
D 5810 Guide for Spiking Intointo Aqueous Samples
D 5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, refer to Terminology D 1129.
4. Significance and Use
4.1 Calcium and magnesium salts in water are the primary components of water hardness which can cause pipe or tube scaling.
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
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to the specifications of the Committee on Analytical Reagents of the American Chemical Society. 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 reagent water conforming to
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These test methods are under the jurisdiction of ASTM Committee D19 on Water and are the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water.
Current edition approved June 10, 2003. Published July 2003. Originally approved in 1937. Last previous edition approved in 1998 as D511–93 (1998).
Current edition approved Oct. 1, 2008. Published November 2008. Originally approved in 1937. Last previous edition approved in 2003 as D 511 – 03.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
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Annual Book of ASTM Standards, Vol 11.02.Reagent Chemicals, American Chemical Society Specifications, American Chemical Society, Washington, DC. For
Suggestions on the testing of reagents not listed by the American Chemical Society, see Annual Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and
the United States Pharmacopeia and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville, 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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D511–08
Specification D 1193,Type 1, II, or III water.Type I is preferred and more commonly used.Type II water was specified at the time
of round-robin testing of these test methods.
NOTE 1—The user must ensure the type of reagent water is sufficiently free of interferences. The water should be analyzed using this test method.
6. Sampling
6.1 Collect the sample in accor
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