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STOPPED-FLOW KINETIC SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF EUROPIUM
Author(s): 
Pages: 34-38
Year: Issue:  2
Journal: Yantai Teachers University journal(Natural Science

Keyword:  stopped-flow kinetic spctrophotometric methoddeterminationeuropium;
Abstract: 在微酸性条件下(pH=2.0),铕(Ⅱ)与铬(Ⅵ)的反应可诱导铬-碘化钾氧化还原慢反应.据此提出了一种测定微量铕(Ⅱ)的停流-动力光学度法,确定了测定的最佳条件,此法测定微量铕(Ⅱ)的线性范围为0~2.1mg/L,检测限为0.015mg/L,间接Sandell灵敏度为0.0015μg/cm2.除铈(Ⅲ)外,其余稀土离子不影响测定.用本法测定了发光材料中的微量铕,所得结果满意.样品加标回收率为96.8%,相对标准偏差RSD=2.1%.
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