钼蓝分光光度法测定纯金中的硅

Determination of silicon content in pure Au by molybdenum blue spectrophotometry

建立了钼蓝分光光度法测定纯金中硅量的方法。确定了基体的分离方法、分离条件、还原剂及其用量;考察了酸度,试剂等对测定的影响。在优化条件下对3个合成试样进行了测定,RSD〈10%。方法的回收率在97%～122%之间,满足测定的要求。方法适用于0.001%～0.005%的硅量的测定。

A method for the determination of silicon content in pure Au by molybdenum blue spectrophotometry is reported in this article.Separation method,separation conditions of matrix,reductant and its amount are chosen;the effects of reagent and inorganic acid,etc,on the determination are tested.With optimized conditions of molybdenum blue spectrophotometric apparatus,three samples are determined.The RSD of this method is less than 10%,and the recoveries range from 97% to 122%.Determination ranges from 0.001% to 0.005%.