Herbicides, insecticides, and many industrial effluents contain arsenic and are potential sources of water pollution. Arsenic is significant because of its adverse physiological effects on humans.
1.1 These test methods cover the photometric and atomic absorption determination of arsenic in most waters and wastewaters. Three test methods are given as follows:
| Concentration Range | Sections | |
| Test Method A—Silver Diethyldithio- carbamate Colorimetric | 5 to 250 μg/L | 7 to 15 |
| Test Method B—Atomic Absorption, Hydride Generation | 1 to 20 μg/L | 16 to 24 |
| Test Method C—Atomic Absorption, Graphite Furnace | 5 to 100 μg/L | 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. 7.1 This test method covers the determination of dissolved and total recoverable arsenic in most waters and waste waters in the range from 5 to 250 μg/L of arsenic. 7.2 The precision and bias data were obtained on reagent water, river water, and process water. The information on precision and bias may not apply to other waters. It is the user''s responsibility to ensure the validity of this test method for waters of untested matrices. 17.1 This test method covers the determination of dissolved and total recoverable arsenic in most waters and wastewaters in the range from 1 to 20 μg/L of arsenic. The range may be extended by dilution of the sample. 17.2 The precision and bias data were obtained on reagent water, tap water, salt water, river water, and untreated wastewater. The information on precision and bias may not apply to other waters. It is the user''s responsibility to ensure the validity of this test method for waters of untested matrices. 27.1 This test method covers the determination of dissolved and total recoverable arsenic in most waters and wastewaters. 27.2 This test method is applicable in the range from 5 to 100 μg/L of arsenic using a 20-μL injection. The range can be increased or decreased by varying the volume of sample injected or the instrumental settings. High concentrations may be diluted but preferably should be analyzed by the atomic absorption-hydride method.......
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