硝酸六氨合钴重量法测定硝酸铑中铑含量
The gravimetry method for determining the rhodium content in rhodium nitrate using cobalt hexammine nitrate
张天琦 1郁光源 1刘文 1刘伟 1白文刚 1付豪 1马王蕊 1陈丽华1
作者信息
- 1. 贵研资源(易门)有限公司,云南玉溪 653100
- 折叠
摘要
采用硝酸六氨合钴重量法测定硝酸铑中铑含量,明确了不同实验条件对铑测定结果的影响,对比了硝酸六氨合钴重量法、氢还原重量法、ICP-AES法对铑含量测定的精密度与准确度.结果表明,试液在150 ℃、5 h条件下消解彻底,亚硝酸钠、沉淀剂的最适宜用量分别为5 g、25 mL,充分恒重可准确测定硝酸铑中铑含量,方法相对标准偏差为0.04％.
Abstract
The rhodium content in rhodium nitrate was determinated using the cobalt hexammine nitrate weight method.The influence of different experimental conditions on the results of rhodium determination were studed.Furthermore,the precision and accuracy of the cobalt hexammine nitrate weight method,hydrogen reduction weight method,and ICP-AES method for determining rhodium content were compared.The results indicate that complete digestion of the solution occurs at 150 ℃ for 5 h.The optimal amounts of sodium nitrite and precipitant are found to be 5 g and 25 mL respectively.Thorough drying ensures accurate determination of rhodium content in nitric acid with a relative standard deviation(RSD)of 0.04％.
关键词
分析化学/重量法/铑/消解/硝酸六氨合钴Key words
analytical chemistry/gravimetry method/rhodium/dissolve/cobaltous hexammine nitrate引用本文复制引用
基金项目
云南省贵金属实验室项目(YPML-2023050201)
出版年
2024
NETL
NSTL
万方数据