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Determination of Arsenic and Selenium by Hydride Generation Atomic Absorption Spectrometry Using a Gas–Liquid Separator and a Dehydration Trap

✍ Scribed by Hisatake Narasaki; Jun-Yan Cao

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 90 KB
Volume: 53
Category: Article
ISSN: 0026-265X
DOI: 10.1006/mchj.1996.0003

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✦ Synopsis

Hydride generated in a mixing coil was collected in a gas-liquid separator, dehydrated in a dehydration trap, and swept into an electrically heated furnace by manipulating electromagnetic relays and timers. Interferences from transition metals were eliminated by the Chelex 100 separation. Sharp peaks were recorded on a recorder. Detection limits (signal to noise ratio 3) of arsenic and selenium were 0.6 ng/ml and 1 ng/ml, respectively. Accuracies checked with biological standard reference materials obtained from the National Institute of Standards and Technology (NIST) of USA and the National Research Council (NRC) of Canada were within the certified values except for those of oyster tissue.

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