摘要
在2 mol/L HCl介质中,Ce(Ⅲ),Eu(Ⅲ),Y(Ⅲ)与DBC-偶氮氯膦形成的络合物吸附到201×7型强碱性苯乙烯阴离子树脂上.最大吸收波长Ce(Ⅲ)络合物为648 nm,Eu(Ⅲ)络合物为650 nm, Y(Ⅲ)络合物为650 nm.Ce(Ⅲ)络合物表观摩尔吸光系数为ε648 nm=9.6×104 L·mol-1·cm-1,Eu(Ⅲ)络合物表观摩尔吸光系数为ε650 nm=1.51×105 L·mol-1·cm-1,Y(Ⅲ)络合物表观摩尔吸光系数为ε650 nm=5.6×104 L·mol-1·cm-1. 固相光度法测定Ce(Ⅲ),Eu(Ⅲ),Y(Ⅲ)质量浓度在0~0.48 μg/mL范围内与吸光度值呈良好线性关系.该法可用于分子筛中Ce的测定.
Abstract: In the medium of 2 mol/L of hydrochloric acid, cerium ( Ⅲ), europium (Ⅲ), yttrium (Ⅲ )-( DBC- hlorophosphonazo) complexes were adsorbed on 201 × 7 type strong base benzenevinyl the systems exhibit absorption nm with apparent molar anion exchange resin and maxima at 648, 650, 650 vities of 9.6×10^4, 1.51×10^5, 5.6 × 10%4 L·mol^-1·cm^-1 for cerium, europium, yttrium complexes, respectively. Beer' s law is obeyed over the range of three rare earth elements 0 - 0.48 μg/mL of cerium, europium, yttrium for the present method. The effects of 33 diverse ions on the detemtination of cerium, europium, yttrium for the solid phase spectrophotometric system were observed, respectively. The method was successfully applied to the detemtination of cerium in molecular sieve with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2005年第10期52-54,共3页
Chinese Journal of Analysis Laboratory
关键词
铈(Ⅲ)
铕(Ⅲ)
钇(Ⅲ)
固相光度法
DBC-偶氮氯膦
分子筛
Cerium (Ⅲ)
Europium (Ⅲ)
Yttrium(Ⅲ)
Solid phase spectrophotometry
DBC-chlorophosphonazo
Molecular sieve