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Standard Test Method for Dissolved Hexavalent Chromium in Water by Ion Chromatography
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 01-12-2017
Publisher: American Society for Testing and Materials
1.1This test method covers procedures for the determination of dissolved hexavalent chromium in wastewater, surface water, and drinking water.
1.2The precision and bias of this test method has been tested in reagent water and industrial wastewater and has been found suitable over the range of approximately 1 to 1000 μg/L. Higher levels can be determined by appropriate dilution.
1.3Samples containing very high levels of anionic species (that is, chloride, sulfate, etc.) may cause column overload. Samples containing high levels of reducing species (that is, sulfides, sulfites, etc.) may cause reduction of Cr(VI) to Cr(III). This can be minimized by buffering the sample to a pH of 9 to 9.5, filtering it, storing it at <6°C. A holding time of 28 days may be used if the user can demonstrate that such holding time does not affect sample integrity in accordance with U.S. EPA 40 CFR 136, Part II.
1.4The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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