Abstract
Selective sorption of Sb(III) on a microcolumn packed with 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide immobilized on silica gel (DPTH-gel) has been used for determination of Sb(III). A flow-injection system comprising a microcolumn connected to the tip of the autosampler was used for preconcentration. The sorbed antimony was eluted with nitric acid directly into the graphite furnace and determined by AAS. The detection limit for antimony under the optimum conditions was 0.3 ng mL−1. This procedure was used for determination of antimony in natural water, soil, vegetation, and a certified sample of a city waste incineration ash (BCR 176).
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The authors thank to the Ministerio de Ciencia y Tecnología for supporting this study (ProjectsBQU2000-0989 and BQU2003-02112) and also the Junta de Andalucia.
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Bosch Ojeda, C., Sánchez Rojas, F., Cano Pavón, J.M. et al. Use of 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide immobilized on silica gel for automated preconcentration and selective determination of antimony(III) by flow-injection electrothermal atomic absorption spectrometry. Anal Bioanal Chem 382, 513–518 (2005). https://doi.org/10.1007/s00216-004-2691-1
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DOI: https://doi.org/10.1007/s00216-004-2691-1