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ASTM D4192-97

Historical Revision

Standard Test Method for Potassium in Water by Atomic Absorption Spectrophotometry (Withdrawn 2024)

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1.1 This test method covers the determination of low amounts of potassium in waters having low solids content. The applicable range of this test method is 0.20 to 4.0 mg/L when using the 766.5-nm resonance line. The range may be extended upward by dilution of an appropriate aliquot of sample or by using the less-sensitive 404.4-nm resonance line. Many workers have found that this test method is reliable for potassium levels to 0.02 mg/L, but use of this test method at this low level is dependent on the configuration of the aspirator and nebulizer systems available in the atomic absorption spectrophotometer as well as the skill of the analyst. The precision and bias data presented are insufficient to justify use of this test method in the 0.02-mg/L range.

1.2 This test method has been used successfully with spiked reagent water. It is the analyst's responsibility to ensure the validity of this test method to other low dissolved solids matrices.

1.3 This standard does not purport to address all of the safety problems, 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 a specific precautionary statement, see Note 2.


SDO ASTM: ASTM International
Document Number D4192
Publication Date Dec. 10, 1997
Language en - English
Page Count 3
Revision Level 97
Supercedes
Committee D19.05
Publish Date Document Id Type View
Feb. 1, 2015 D4192-15 Revision
Oct. 1, 2008 D4192-08 Revision
Jan. 10, 2003 D4192-03 Revision
Dec. 10, 1997 D4192-97 Revision