四辛基锡中锡(Ⅱ)的测定

Tin( II) Determination in Tetraoctyl Tin

研究了四辛基锡中锡（Ⅱ）含量的测定方法。试样经浓硫酸高温碳化,以金属铝还原锡（Ⅳ）为锡（Ⅱ）,铁粉消除溶解氧的影响,淀粉为指示剂,碘酸钾标准滴定溶液滴定锡（Ⅱ）。该方法的标准偏差为0.179,回收率在98.46%~100.70%之间,试样中共存的其它元素均不干扰测定。

This paper studies the method for the determination of tin content in tetraoctyhin. Samples were high -temperature carbonized by concentrated sulphuric acid, and reduction of tin （IV） to tin （Ⅱ） by metal aluminum, iron powder to eliminate the influence of dissolved oxygen and starch as indicator, iodate potassium Standard volumetric titration tin （Ⅱ）. The standard deviation of this method is 0. 179, the recov- ery rate is between 98.46% and 100. 70% ,the other elements in the sample did not interfer with the deter- mination.