摘要
研究了电位滴定法测定含锰粗制碳酸钴、粗氢氧化钴中钴量的方法。通过溶解样品时,加入高氯酸和磷酸,使锰(Ⅱ)氧化后生成磷酸锰(Ⅲ),消除了锰对钴测定的干扰。试验结果表明:在拟定条件下80mg锰不干扰钴的测定,样品分析的精密度RSD<0.3%,加标回收率99.56%～100.15%,与其他方法的对照结果一致,满足常量钴测定要求。
When the samples were dissolved,perchloric acid and phosphoric acid were added to oxidize manganese(II)to manganese(III)phosphate,which eliminates the interference of manganese on the determination of cobalt.The test results showed that under the proposed conditions,no significant interferences were brought by 80 mg manganese for the determination of cobalt.The precision of sample analysis based on RSD test was below 0.3%,and the recoveries were in the range of 99.56%—100.15%.The results were in consistent with the results determined by other methods and could meet the requirements of cobalt determination in macro amount.
作者
朱国忠
喻生洁
徐艳燕
何云祥
马群
Zhu Guozhong;Yu Shengjie;Xu Yanyan;He Yunxiang;Ma Qun(National Nickel and Cobalt Advanced Materials Engineering Research Center,Lanzhou 730101,China;Lanzhou Jinchuan Advanced Materials Technology Co.,Ltd.,Jinchang,737100,China;Testing Center of Jinchuan Group,Jinchang737100,China)
出处
《分析仪器》
CAS
2019年第2期38-42,共5页
Analytical Instrumentation
基金
金川集团科研项目基金
关键词
粗钴盐
锰
钴
电位滴定
Crude cobalt salt
Manganese
Cobalt
Potentiometric titration
