【摘要】 提出了HCl-H2O2微波快速消解难溶AuZr、AuAgZr合金的新方法,优化了样品预处理及EDTA滴定以测定Zr(IV)含量的条件;考察了在不同HCl酸度下,预处理过程对Zr价态的影响;对比了本法与传统方法的分析结果。研究表明:在4.5%～6.0%HCl下,Zr以+4价状态存在,本法与传统方法测得Zr(IV)的结果吻合,但本法新颖,消解快速、节能,分析操作简便、易于掌握,测定3～20mgZr(IV)量,相对误差-0.33%～+0.08%。本法明显优于传统方法,适宜推广应用。更多还原

【Abstract】 A novel method of microwave-assisted digestion with HCl-H2O2 for the difficultly dissolved gold-zirconium and gold-silver-zirconium alloys was developed. The conditions of sample pretreatment and determination of zirconium with EDTA titration were optimized. Effect of pretreatment with different acidities on zirconium valence was investigated. The proposed method was also compared with the traditional method. Research results showed that zirconium is always in the valence of +4 in 4.5%～6.0%HCl, and there is no significant difference between the two methods on accuracy (relative error -0.33%～+0.08%) for zirconium content from 3 to 20mg. But the proposed method is novel, rapid, economic and convenient leading to its widely apply.更多还原