摘要
用吡咯烷二硫代氨基甲酸铵 (APDC) 甲基异丁基酮 (MIBK )萃取体系 ,石墨炉原子吸收光谱法测定高纯稀土氧化钐中铬。用硝酸调节溶液 pH为 2 ,加 2 0g·L- 1APDC溶液 2ml,水相与有机相体积比为 6∶1,萃取分离后测定 ,常见离子无干扰。对氧化钐中痕量铬的测定 ,相对标准偏差 (n =11)为 8.9% ,加标回收率为 90 %～ 10 3%
A rapid and simple method for the determination of trace amounts of chromium in high purity samaria by extraction GFAAS is reported. Chromium is extracted in a pH 2 solution with APCD MIBK. The ratio of the volumes of aqueous and organic phases taken is 6∶1. Possible interferences from non rare earth elements are tested and their tolerable quantities are qualified. The relative standard deviation based on 11 determinations is found to be smaller than 8.9%, and the recoveries are in the range 90%～103%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2002年第3期121-122,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
萃取
石墨炉原子吸收光谱法
测定
氧化钐
铬
稀土
分析
Graphit furnace atomic absorption spectrometry
Chromium
Samarium Oxide
Extraction
