Combination of on-line preconcentration by di（2-ethylhexyl） phosphoric acid resin in the presence of complexing agent with microwave plasma-atomic emission spectrometry for the determination of rare earths
来源期刊：Journal of Rare Earths2010年第S1期
论文作者：赵晓伟 孔祥飞 贾琼 周伟红 曲晓刚
文章页码：79 - 82
摘 要：The adsorption of rare earths,lanthanum,cerium,neodymium,and yttri um by di（2-ethylhexyl） phosphoric acid（D2EHPA） resin in the presence of a compl exing agent,EDTA,was investigated. Flow injection was selected as the injectin g method. Various parameters,sample pH,sample loading time,sample flow rate,EDTA concentration,EDTA flow rate,eluent concentration,and eluent flow rate,were studied and optimized. Under the optimum conditions,the method allowed the determination of rare earths with detection limits of 1.09 μg/L（lanthanum）,3 .31 μg/L（cerium）,2.05 μg/L（neodymium）,and 1.25 μg/L（yttrium） . High repea tabilities were obtained for all the four rare earths（RSD<5%） . The proposed met hod was applied to the determination of the rare earths in water samples with a recovery range of 95.8%-103.3%.
赵晓伟1，孔祥飞1，贾琼1，周伟红1，曲晓刚2
1. College of Chemistry,Jilin University2. Changchu n Institute of Applied Chemistry,Chinese Academy of Sciences
摘 要：The adsorption of rare earths,lanthanum,cerium,neodymium,and yttri um by di（2-ethylhexyl） phosphoric acid（D2EHPA） resin in the presence of a compl exing agent,EDTA,was investigated. Flow injection was selected as the injectin g method. Various parameters,sample pH,sample loading time,sample flow rate,EDTA concentration,EDTA flow rate,eluent concentration,and eluent flow rate,were studied and optimized. Under the optimum conditions,the method allowed the determination of rare earths with detection limits of 1.09 μg/L（lanthanum）,3 .31 μg/L（cerium）,2.05 μg/L（neodymium）,and 1.25 μg/L（yttrium） . High repea tabilities were obtained for all the four rare earths（RSD<5%） . The proposed met hod was applied to the determination of the rare earths in water samples with a recovery range of 95.8%-103.3%.
关键词：
