ASTM D2972-97

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 2972 – 97
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Methods for
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Arsenic in Water
This standard is issued under the fixed designation D 2972; 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 (e) indicates an editorial change since the last revision or reapproval.
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1. Scope Methods for Chemical Analysis of Metals
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E 275 Practice for Describing and Measuring Performance
1.1 These test methods cover the photometric and atomic
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
absorption determination of arsenic in most waters and waste-
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eters
waters. Three test methods are given as follows:
Concentration Sections
3. Terminology
Range
Test Method A—Silver Diethyldithio- 5 to 250 μg/L 7 to 15
3.1 Definitions of Term Specific to This Standard:
carbamate Colorimetric
3.1.1 For definitions of terms used in these test methods
Test Method B—Atomic Absorption, 1 to 20 μg/L 16 to 24
refer to Terminology D 1129.
Hydride Generation
Test Method C—Atomic Absorption, 5 to 100 μg/L 25 to 33
3.2 Definitions of Terms Specific to This Standard:
Graphite Furnace
3.2.1 total recoverable arsenic—an arbitrary analytical term
1.2 The analyst should direct attention to the precision and
relating to the forms of arsenic that are determinable by the
bias statements for each test method. It is the user’s responsi- digestion method which is included in the procedure. Some
bility to ensure the validity of these test methods for waters of
organic-arsenic compounds, such as phenylarsonic acid, diso-
untested matrices. dium methane arsonate, and dimethylarsonic acid, are not
1.3 This standard does not purport to address all of the
recovered completely during the digestion step.
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.1 Herbicides, insecticides, and many industrial effluents
bility of regulatory limitations prior to use. For specific hazard contain arsenic and are potential sources of water pollution.
statements, see Note 1 and Note 5. Arsenic is significant because of its adverse physiological
effects on humans.
2. Referenced Documents
5. Purity of Reagents
2.1 ASTM Standards:
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D 1129 Terminology Relating to Water 5.1 Reagent grade chemicals shall be used in all tests.
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D 1193 Specification for Reagent Water Unless otherwise indicated, it is intended that all reagents shall
D 2777 Practice for Determination of Precision and Bias of conform to the specifications of the Committee on Analytical
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Applicable Methods of Committee D–19 on Water Reagents of the American Chemical Society, where such
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D 3370 Practices for Sampling Water from Closed Con- specifications are available. Other grades may be used, pro-
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duits vided it is first ascertained that the reagent is of sufficiently
D 3919 Practice for Measuring Trace Elements in Water by high purity to permit its use without lessening the accuracy of
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Graphite Furnace Atomic Absorption Spectrophotometry the determination.
D 4841 Practice for Estimation of Holding Time for Water 5.2 Purity of Water— Unless otherwise indicated, refer-
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Samples Containing Organic and Inorganic Constituents ences to water shall be understood to mean reagent water
E 60 Practice for Photometric and Spectrophotometric conforming to Specification D 1193 Type I. Other reagent
water types may be used provided it is first ascertained that the
water is of sufficiently high purity to permit its use without
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These test methods are under the jurisdiction of ASTM Committee D-19 on
adversely affecting the bias and precision of the test method.
Water and are the direct responsibility of Subcommittee D 19.05 on Inorganic
Constituents in Water.
Current edition approved Dec. 10, 1997. Published February 1998. Originally
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published as D 2972 –93 T. Last previous edition D 2972 – 93. Annual Book of ASTM Standards, Vol 03.05.
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Similar to that appearing in Standard Methods for the Examination of Water Annual Book of ASTM Standards, Vol 03.06.
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and Wastewater, 12th edition, APHA, Inc., New York, NY, 1965, and identical with Reagent Chemicals, American Chemical Society Specifications, American
that in Brown, Eugene, Skougstad, M. W., and Fishman, M. J., “Methods for Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Collection and Analysis of Water Samples for Dissolved Minerals and Gases,” listed by the American Chemical Society, see Analar Standards fo
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