Abstract − Analytical Sciences, 19(6), 917 (2003).
Simultaneous Spectrophotometric Determination of Bi(III) and Sb(III) Based on Their Complexes with Iodide in Acidic Media Using the H-Point Standard Addition Method and First-Derivative Spectrophotometry
Abbas AFKHAMI and Ali Reza ZAREI
Department of Chemistry, Faculty of Sciences, Bu-Ali Sina University, Hamadan, Iran
The H-point standard addition method (HPSAM) was applied to the simultaneous determination of Bi(III) andSb(III). This method is based on the difference in the absorbance of complexes of Bi(III) and Sb(III) with iodide in acidic media in different wavelength pairs. The results showed that Bi(III) and Sb(III) can be determined simultaneously with concentration ratios of 15:1 to 1:20. First-derivative spectrophotometry was also used for the simultaneous determination of Bi(III) and Sb(III) based on their complexes with iodide. The proposed methods were successfully applied to the simultaneous determination of Bi(III) and Sb(III) in synthetic samples.
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