摘要
通过优化铱电极中铱测定的前处理条件,采用ICP-MS法,建立铱电极中铱含量(10 g/t~1000 g/t)的分析方法。试验结果表明:灰吹保护剂钯的加入量大于1 mg,Na_(2)O_(2)加入量为2 g,熔融温度为800℃,熔融时间为20 min,193Ir作为测定同位素消除质谱干扰,标准溶液和试样加入等量的Na_(2)O_(2)能消除钠离子干扰。按以上实验方法测定3个不同含量的铱电极相对标准偏差(RSD)为0.52%~1.45%;加标回收率在94%~101%之间。表明该方法重复性好,准确度高。
The iridium content(10 g/t~1000 g/t)in iridium electrode was determined by ICP-MS method.The results showed that the addition amount of palladium was greater than 1 mg,the addition amount of Na_(2)O_(2) was 2 g,the melting temperature was 800℃,the melting time was 20 min,193 Ir was used as the determination isotope to eliminate the interference of mass spectrum,the standard solution and sample adding the same amount of Na_(2)O_(2) can eliminate the interference of sodium ion.The relative standard deviations(RSD)of three iridium electrodes with different contents were 0.52%~1.45%.The recoveries of standard addition range from 94%to 101%.The results show that the method has good repeatability and high accuracy.
作者
张晓娟
ZHANG Xiao-juan(Testing Technology Company of Changsha Research Institute of Mining and Metallurgy Co.,Ltd.,Hunan Changsha 410012;Hunan Agricultural University,Hunan Changsha 410012,China)
出处
《广州化工》
CAS
2024年第10期57-59,共3页
GuangZhou Chemical Industry
关键词
铅试金
电感耦合等离子体法质谱法
铱电极
铱
lead assay
inductively coupled plasma mass spectrometry
iridium electrode
iridium
