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EPA-EAD: Method 1632: Chemical Speciation of Arsenic in Water and Tissue
Description
| Brief Method Summary: | After collection, an aliquot of water sample or tissue digestate is placed in a specially designed reaction vessel to which 6M HCl is added, followed by the addition of 4% NaBH4. Arsines are purged from the sample onto a cooled glass trap where they are then thermally desorbed into an inert gas stream that carries them into an atomic absorption spectrophotometer for detection. |
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| Scope And Application: | This method determines inorganic arsenic (IA), arsenite (Ar+3), arsenate (As+5), monomethylarsonic acid (MMA), and dimethylarsinic (DMA) in filtered and unfiltered water and in tissue. |
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| Applicable Conc Range: | 0.01-50 ug/L in water.
0.10-500 ug/g dry weight of tissue. |
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