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《Journal of Analytical Science》 1993-03
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Study on Simultaneous Determination of In and Sn with Regress-orthogonal Designs and Oseillopolarography

Zhu Lihua,Zhang Jiazhong,Lu Xiaohua,Shi Wenzhau(Chemistry Department of Huazhong University of Science and Technology, Wuhan)  
In a supporting solution of 2.5%oxalic acid with presence of 0.01% methylene blue, two nonlinear regress models for relationships between oscillopolarographic secondary derivative peak height of In and Sn and their concentrations have been eatablished with orthogonal design-regress analysis,which have been used to simultaneously determine In and Sn in their coexistence systems. Compared with the literature, this method shows a marked advantage of wide range of relative concentration of two compounds, which provides a new method for simultaneous determination of two components in non-over-severe overlapping polarographic system. This method has been used in simultaneous deter-mnination of In and Sn in aluminiurn alloys with recovery or 92.2 to 108.8%.
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