Study of interferences by transition metal ions in hydride generation atomic absorption spectrometry of antimony |
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Authors: | J. Agterdenbos D. Bax |
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Affiliation: | Department of Chemistry, Gadjah Mada University, Sekip Unit III, P.O. Box Bls 21, Yogyakarta Indonesia;Laboratory for Analytical Chemistry, State University of Utrecht, Croesestraat 77a, 3522AD Utrecht The Netherlands;Laboratory for Analytical Chemistry, State University of Utrecht, Croesestraat 77a, 3522AD Utrecht The Netherlands |
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Abstract: | The mechanism of the interference of metal ions in the hydride generation atomic absorption spectrometry (AAS) of antimony was studied. Experiments on the decomposition rate of sodium tetrahydroborate in acidic media were done in the presence of interfering metals, with and without the addition of masking agents. The results were compared with experiments on the sensitivity of AAS in the presence of the same interfering metals with and without the addition of the same masking agents. AAS experiments are described in which the product of the reaction between sodium tetrahydroborate and one of the interfering metals was present during hydride formation. This reaction product was certainly one of the causes of interference, but the contribution of the catalytic decomposition of sodium tetrahydroborate to interference is not clear. |
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Keywords: | Atomic absorption spectrometry Antimony Interferences Transition metal ions |
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