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Effects of Acid and Pre-Reductant in the Analysis of Arsenic by Hydride Generation-Atomic Absorption Spectrometry
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.2, pp.151-157
Lim,
H., &
Lee,
S.
(2000). Effects of Acid and Pre-Reductant in the Analysis of Arsenic by Hydride Generation-Atomic Absorption Spectrometry. Analytical Science and Technology, 13(2), 151-157.
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Abstract
Effects of acids and pre-reductants in the analysis of arsenic have been studied by hydride generation-atomic absorption spectrometry. The analytical results were strongly dependent on the acid concentrations. All the pre-reductants was very effective to observe the arsenic signal at strong acid concentrations (3 M-5 M). However, at the low acid condition (<TEX>${\leq}0.1M$</TEX>), L-cysteine only showed a reasonable effect on the absorption signal. When the sample was treated with the nitric acid, absorption signal was unstable and was also decreased. Although interference effects were observed from metal ions such as <TEX>$Cr^{6+}$</TEX> and <TEX>$Br^{5+}$</TEX> at low acid condition, the generation of hydride could be increased by the strong acid condition.
- keywords
- hydride generation AAS, arsenic, acid effects, pre-reductant effects
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