Determination of Antimonite (Sb(III)) and Antimonate (Sb(V)) Species using Hydride Generator-Quartz Flame Atomic Absorption Spectrophotometry (HG-QFAAS) Techniques
Herlinawati, B. Buchari, M. B. Amran

Abstract
The determination of antimonite (Sb(III)) and antimonate (Sb(V)) species using HG - QFAAS have been done. To increase the sensitivity of the measurements, a gas-liquid reactor - separator integrated into the HG-QFAAS system has been successfully prepared. In fact, this gas-liquid reactor-separator is able to increase the sensitivity of determination of Sb ions in solution. The optimum conditions of parameters measurement in the determination of Sb ion species with HG method are influenced by the type of acids, the acid concentrations, and the reductant concentrations have been determined, and can increase the measurement of analytical performance simultaneously.The result obtained showed that the antimony species provide a good measurement signal. The optimization results showed that the highest absorbance value can be obtained by using 5 M HCl and 1%NaBH4.The analytical performance obtained is very good, which is shown by repeatability level has been shown by it’s coefficient of variance was 2,33% for the Sb(III) standard concentration 6 μg.L-1 and 4,40 % for the Sb(V) standard concentration 150 μg.L-1,linearity of the calibration curve are 2 - 10 μg.L-1 for Sb(III) and 50 - 250 μg.L-1 for Sb(V), detection limit of 0,26 μg.L-1for the Sb(III)and 8,42 μg.L-1 for the Sb(V).

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