ASTM D511-14

Standard Test Methods for Calcium and Magnesium In Water

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.
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  
7 – 15  
Test Method B—Atomic Absorption Spectrometric  
16 – 25  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversion to inch-pound units that are provided for information only and are not considered 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2014
• 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)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D511 − 14
Standard Test Methods for
1
Calcium and Magnesium In Water
This standard is issued under the fixed designation D511; 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* D4691 Practice for Measuring Elements in Water by Flame
Atomic Absorption Spectrophotometry
1.1 These test methods cover the determination of calcium
D4841 Practice for Estimation of Holding Time for Water
and magnesium in water by complexometric titration and
Samples Containing Organic and Inorganic Constituents
atomic absorption spectrometric procedures. Two test methods
D5810 Guide for Spiking into Aqueous Samples
are included, as follows:
D5847 Practice for Writing Quality Control Specifications
Sections
for Standard Test Methods for Water Analysis
Test Method A—Complexometric Titration 7–15
Test Method B—Atomic Absorption Spectrometric 16–25
3. Terminology
1.2 The values stated in SI units are to be regarded as
3.1 Definitions—For definitions of terms used in these test
standard. The values given in parentheses are mathematical
methods, refer to Terminology D1129.
conversion to inch-pound units that are provided for informa-
tion only and are not considered standard.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 Calcium and magnesium salts in water are the primary
safety concerns, if any, associated with its use. It is the
components of water hardness which can cause pipe or tube
responsibility of the user of this standard to establish appro-
scaling.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Purity of Reagents
Specific hazard statements are given in 12.2.6 and 20.6.
5.1 Reagent grade chemicals shall be used in all tests.
1.4 This international standard was developed in accor-
Unless otherwise indicated, it is intended that all reagents shall
dance with internationally recognized principles on standard-
conform to the specifications of the Committee on Analytical
ization established in the Decision on Principles for the
3
Reagents of the American Chemical Society. Other grades
Development of International Standards, Guides and Recom-
may be used, provided it is first ascertained that the reagent is
mendations issued by the World Trade Organization Technical
of sufficiently high purity to permit its use without lessening
Barriers to Trade (TBT) Committee.
the accuracy of the determination.
2. Referenced Documents
5.2 Purity of Water—Unless otherwise indicated, references
2
towatershallbeunderstoodtomeanreagentwaterconforming
2.1 ASTM Standards:
to Specification D1193, Type 1, II, or III water. Type I is
D1129 Terminology Relating to Water
preferred and more commonly used. Type II water was
D1193 Specification for Reagent Water
specified at the time of round-robin testing of these test
D2777 Practice for Determination of Precision and Bias of
methods.
Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
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
1
These test methods are under the jurisdiction of ASTM Committee D19 on
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic 6.1 Collect the sample in accordance with Practices D3370.
Constituents in Water.
Current edition approved Oct. 1, 2014. Published November 2014. Originally
3
approved in 1937. Last previous edition approved in 2009 as D511 – 09. DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D0511-14. Chemical Society, Washington, DC. For Suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Annual Standards for Laboratory
contact ASTM Customer Service at [e-mail]. 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. Pharmacopeial 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
1

---------------------- Page: 1 ----------------------
D511 − 14
6.2 If total recoverable calcium
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: D511 − 09 D511 − 14
Standard Test Methods for
1
Calcium and Magnesium In Water
This standard is issued under the fixed designation D511; 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*
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 7 – 15
Test Method B—Atomic Absorption Spectrometric 16 – 25
Sections
Test Method A—Complexometric Titration 7 to 14
Test Method B—Atomic Absorption Spectrometric 15 to 23
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this The values
given in parentheses are mathematical conversion to inch-pound units that are provided for information only and are not considered
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
2
2.1 ASTM Standards:
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
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D5810 Guide for Spiking into Aqueous Samples
D5847 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 D1129.
3.1 Definitions—For definitions of terms used in these test methods, refer to Terminology D1129.
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.
1
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 May 1, 2009Oct. 1, 2014. Published May 2009November 2014. Originally approved in 1937. Last previous edition approved in 20032009 as
D511 – 03.D511 – 09. DOI: 10.1520/D0511-09.10.1520/D0511-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D511 − 14
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
3
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
Specification D1193, 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 accordance with Practices D3370.
6.2 If total recoverable calcium and magnesium concentrations are being determined, acidify the water sample with HNO (sp
3
gr 1.42) to a pH of 2 or less immediat
...