资料介绍,测定毫克量及微克量的锆,可在煮沸条件下用EDTA直接滴定,在高酸度下选择性好,终点敏锐。但在金锆合金中络合滴定锆时,大量金的黄色溶液有干扰,按常用的亚硫酸等还原剂把金还原沉淀后再滴定其它金属离子的方法,测定锆的结果不大稳定。作者观察到用强还原剂还原金溶液时,黄色溶液在短时间内先被还原至无色,随后迅速转为棕黑色沉淀。由此得到启示,作者选择了弱还原剂,可保持长 Data presentation, determination of milligram amounts and micrograms of zirconium, can be titrated with EDTA under boiling conditions, the selectivity in high acidity, the end point sensitive. However, when zirconium complexation titration zirconium zirconium complex, a large number of gold yellow solution interference, according to commonly used sulfurous acid and other reducing agents to restore the precipitation of gold and then titration of other metal ions, the determination of zirconium results are not stable. The authors observed that when the gold solution was reduced with a strong reducing agent, the yellow solution was first reduced to colorless in a short period of time, followed by rapid conversion to a brownish-black precipitate. From this revelation, the author chose a weak reducing agent, can maintain long