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%。
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%.
作者
张天琦
郁光源
刘文
刘伟
白文刚
付豪
马王蕊
陈丽华
ZHANG Tianqi;YUGuangyuan;LIU Wen;LIU Wei;BAI Wengang;FU Hao;MA Wangrui;CHEN Lihua(Sino-Platinum Metals Resources(Yimen)Co.Ltd.,Yuxi,653100,Yunnan,China)
出处
《贵金属》
CAS
北大核心
2024年第S01期198-200,共3页
Precious Metals
基金
云南省贵金属实验室项目(YPML-2023050201)。
关键词
分析化学
重量法
铑
消解
硝酸六氨合钴
analytical chemistry
gravimetry method
rhodium
dissolve
cobaltous hexammine nitrate
