Determining the practical quantitation level for arsenic
- Montgomery Lab., Pasadena, CA (United States)
In light of the fact that the maximum contaminant level (MCL) for arsenic is likely to be lowered significantly, the purpose of this study was to assess the capabilities of laboratories for arsenic analysis by atomic absorption spectrometry at concentrations near those being considered for the revised MCL. The evaluation involved 22 laboratories and used four representative drinking water matrixes to determine a practical quantitation level (PQL) for arsenic, which could be used by the US Environmental Agency in setting the new MCL. Samples were spiked with arsenic at concentrations ranging from 1 to 10 [mu]g/L. On an interlaboratory basis, analytical precision and bias changed markedly at concentrations < 4 [mu]g/L, setting a lower limit to the PQL of 4 [mu]g/L. Reliable quantitation levels were also determined.
- OSTI ID:
- 7309854
- Journal Information:
- Journal of the American Water Works Association; (United States), Journal Name: Journal of the American Water Works Association; (United States) Vol. 86:2; ISSN 0003-150X; ISSN JAWWA5
- Country of Publication:
- United States
- Language:
- English
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540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ARSENIC
CONTAMINATION
DRINKING WATER
ELEMENTS
HYDROGEN COMPOUNDS
INTERLABORATORY COMPARISONS
MAXIMUM PERMISSIBLE CONCENTRATION
OXYGEN COMPOUNDS
POLLUTION
SAFETY STANDARDS
SEMIMETALS
STANDARDS
WATER
WATER POLLUTION