摘要
以碘量法及ICP-AES法补正滤液中的残余量共同测定粗碲中的铜量,考察了杂质含量、酸分解试验、沉淀剂分离方法选择、滴定过程中缓冲溶液用量、共存离子等对测定的影响,结果表明:选择合适的酸分解方法,优化各条件参数,测定结果的相对标准偏差(RSD值)在0.15%~0.71%,加标回收率在99.70%~100.26%,精密度好、准确性高,方法简单快速。
The copper volume in crude tellurium is determined by both iodimetry and ICP - AES method that correction of the residual volume of filtrate, the following items are investigated, including impurites content, acid decomposition test, the selection of precipi- tant separation method, the dosage of buffer solution in the titration process, the effect of co-existing ion on determination, the results show： the proper acid decomposition method is selected, and each parameters are optimized, the relative standard deviation （RSD） of determining results is in the range of 0. 15% -0. 71%, the recovery rate with standard is in 99.70% - 100. 26%, which has good precision, high accu- racy, the method is simple and rapid.
出处
《云南冶金》
2017年第3期55-61,共7页
Yunnan Metallurgy
基金
工信厅科[2016]58号(项目编号:2016-0216T-YS)
自治区直属公益性科研院所基本科研业务费专项(项目编号:2015ACZ05)
关键词
碘量法
ICP-AES法
粗碲
铜量
iodimetry
ICP- AES method
crude tellurium
copper volume
