Simultaneous spectrophotometric determination of Sn(II) and Sn(IV) by mean centering of ratio kinetic profiles and partial least squares methods

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• 作者：Tayyebeh Madrakian ; Abbas Afkhami ; Roshanak Moein ; Morteza Bahram
• 关键词：Sn(II) and Sn(IV) ; Simultaneous determination ; Orange juice ; Water
• 刊名：Talanta
• 出版年：2007
• 期刊代码：106_00399140
• 类别：ch
• 出版时间：31 July 2007
• 卷：72
• 期：5
• 页码：1847-1852
• 文件大小：473 K

摘要

Two spectrophotometric methods are described for the simultaneous determination of binary mixtures of Sn(II) and Sn(IV) in water samples and fruit juice samples, without prior separation steps, using the mean centering of ratio kinetic profiles and partial least squares (PLS) methods. The methods are based on the difference in the rate of the reactions of Sn(II) and Sn(IV) with pyrocatechol violet at pH 4.0. The methods allow rapid and accurate determination of Sn(II) and Sn(IV). The analytical characteristics of the methods for the simultaneous determination of binary mixtures of Sn(II) and Sn(IV) were calculated. The results showed that the methods were capable to simultaneous determination of 0.1–1.80 mg L⁻¹ each of cations. The proposed methods were successfully applied to the simultaneous determination of Sn(II) and Sn(IV)in an orange juice sample.