电解分离-电感耦合等离子体发射光谱法测定纯铜中杂质元素

以硫硝混酸为电解液，控制电解电流为2 A，建立了电解分离-电感耦合等离子体发射光谱法测定纯铜中19种杂质元素（Mg、Bi、Al、P、Ti、Cr、Mn、Fe、Zn、Co、Ni、As、Se、Zr、Cd、Sn、Sb、Te 和 Pb）的方法。结果显示，在最佳实验条件下，大于99%的铜沉积至阴极，各杂质元素的回收率大于90%。研究了电解后电解液的酸效应和残余铜对测定的影响，结果表明，基体效应影响较小，可通过基体匹配来进一步消除其影响。各杂质元素的检出限在0.02～4 mg/kg之间。运用该方法测定纯铜标准物质GBW02141，各元素测定值与认定值吻合。以高纯铜空白样品做加标回收试验，除Bi外，各元素的加标回收率在90%～100%之间，相对标准偏差（RSD，n=5）在0.2%～7.2%之间。

Determination of impurities in pure copper by electrolytic separation-inductively coupled plasma atomic emission spectrometry

Through using nitric-sulfuric acid as electrolyte and controlling the electrolytic current at 2 A,nineteen trace impurities(Mg,Bi,Al,P,Ti,Cr,Mn,Fe,Zn,Co,Ni,As,Se,Zr,Cd,Sn,Sb,Te and Pb)in pure copper were determined with a combination of electrochemical deposition separation and inductively coupled plasma atomic emission spectrometry.The results showed that more than 99% of Cu matrix was deposited on cathode with the recoveries of impurities higher than 90 % under the optimized conditions.The effects of acid...