Designation: D2972 – 08
Standard Test Methods for
Arsenic in Water1
This standard is issued under the ﬁxed designation D2972; 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.
1. Scope 1.1 These test methods2 cover the photometric and atomic absorption determination of arsenic in most waters and wastewaters. Three test methods are given as follows: Test Method A—Silver Diethyldithiocarbamate Colorimetric Test Method B—Atomic Absorption, Hydride Generation Test Method C—Atomic Absorption, Graphite Furnace Concentration Range 5 to 250 µg/L 1 to 20 µg/L 5 to 100 µg/L Sections 7 to 15 16 to 24 25 to 33
1.2 The analyst should direct attention to the precision and bias statements for each test method. It is the user’s responsibility to ensure the validity of these test methods for waters of untested matrices. 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 speciﬁc hazard statements, see Note 1 and Note 6. 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 Oct. 1, 2008. Published October 2008. Originally approved in 1993. Last previous edition approved in 2003 as D2972 – 03. DOI: 10.1520/D2972-08. 2 Similar to that appearing in Standard Methods for the Examination of Water and Wastewater, 12th edition, APHA, Inc., New York, NY, 1965, and identical with that in Brown, Eugene, Skougstad, M. W., and Fishman, M. J., “Methods for Collection and Analysis of Water Samples for Dissolved Minerals and Gases,” Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, 1970 p. 46.
2. Referenced Documents 2.1 ASTM Standards:3 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 D3919 Practice for Measuring Trace Elements in Water by Graphite Furnace 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 E60 Practice for Analysis of Metals, Ores, and Related Materials by Molecular Absorption Spectrometry E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers 3. Terminology 3.1 Deﬁnitions of Term Speciﬁc to This Standard: 3.1.1 For deﬁnitions of terms used in these test methods refer to Terminology D1129. 3.2 Deﬁnitions of Terms Speciﬁc to This Standard: 3.2.1 total recoverable arsenic—an arbitrary analytical term relating to the forms of arsenic that are determinable by the digestion method which is included in the procedure. Some organic-arsenic compounds, such as phenylarsonic acid, disodium methane arsonate, and dimethylarsonic acid, are not recovered completely during the digestion step. 3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at email@example.com. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.
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