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Determination of Micro Selenium in Blood by PS 4.0 Micro Computer Polarograph
Author(s): 
Pages: 59-61
Year: Issue:  4
Journal: GUANGDONG TRACE ELEMENTS SCIENCE

Keyword:  微机极谱仪催化波血样;
Abstract: 采用DTD 4.0型恒温消解仪消解血样,节省了常量样品消化所用的大量硝酸和高氯酸,用PS 4.0微机极谱仪测定了血样中的微量硒.在高氯酸溶液中四价硒与亚硫酸钠形成硒的络合物,用EDTA作掩蔽剂.在氨-氯化铵-碘酸钾缓冲溶液中,峰电位-0.85 V(相对饱和甘汞电极)产生灵敏的催化波,根据峰高计算出硒含量.检测下限0.5 μg/L,线性范围0.5~10.0 μg/L,变异系数为2.09%,回收率98.2%.锌、锰、铜不干扰测量.分析结果满意.
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