碘量法测定锡基轴承合金中铜的改进

Improved Iodimetry for Determining Copper in Tin-based Bearing Alloy

叙述了在主体锡、锑金属离子存在下 ,以盐酸为介质 ,用酒石酸掩蔽锡 (Ⅳ )、锑 (Ⅴ ) ,使之形成稳定的络合物 ,并在醋酸介质中进行碘量滴定分析。手续简便 ,结果准确 ,节省试剂 ,提高工效。本法已应用于锡基轴承合金、巴氏合金及含有锡或锑的粗铜中铜的测定 ,效果良好。

Iodimetric analysis performed in acetic acid medium in the presence of host tin and antimony ions is presented.The tin ions and antimony ions are masked with tartaric acid using hydrochloric acid as medium and formed into stable complex compound.The results are accurate with simplified procedures,improved effectiveness and reduced reagent cost.This method has been employed with good results for determining copper in tin-based bearing alloy,Babbitt alloy and crude copper containing tin and antimony.