【摘要】 在硝酸-高氯酸底液中,利用玻炭金膜电极阳极溶出伏安法测定尿硒含量。在40ppb以内硒含量与溶出峰成线性关系。检出限为0.5ppb,回收率101.6±4.4％,标准差σ(n-1)2.2,变动系数2.2％。方法与萤光分光光度法测定结果相符,相关系数r=0.9985,p>0.05。该法成功地应用于健康人、冠心病及肿瘤患者的尿硒测定。更多还原

【Abstract】 A method is established for determination of selenium by anodic stripping voltammetry with a gold-film deposited on a glassy graphite eledtrode. The substrate of medium consists of mixed acid HNO3 and HCIO4 in which [H+] >0.2M. The following are results: a pretty linear relationship between the concentration range of 0-40 ppb Se and the peak height of stripping is observed, the limit of determination is 0.5 ppb, the rate of recovery-101.6±4.4%, the standard deviation-σn-12.2, and the coefficient of variation-2.2%. The results obtained are nearly coincident with fluorometry(p<0.05).更多还原