摘要
阴极溶出伏安法测定痕量硒已有报导,但准确度不佳,灵敏度还嫌不够。本文研究了盐酸和铜体系测定硒,在适宜条件,测定硒的浓度范围为0.04~20ng/mL,检测限为pg/mL级,硒含量在0.14ng/mL,变动系数小于10%。用拟定的方法测定了低硒地区水样及含硒量较高的粮食和人发.
This paper describehe the determination of Se(Ⅳ) in 0.5 mol/L HCl-4μg/mL Cu(Ⅱ) solution by title metthod. The height of the strpping peak can be deter-mined at -0.54 or -0.63 V (vs. SCE), determined concentration range is 0.04- 20ng/mL of Se, and the pre-electrolytic potential, is -0.25 or -0.35 V. The detection limit is pg/mL level. The relative standard deviation is 7.1% at the concentration of Se(Ⅳ) 0.14 ng/mL.The reaction process and behavior of the cathodic stripping peaks have been studied and discussed.
作者
周漱萍
董文举
Zhou Shuping;Dong Venju(Department of Chemistry,Benan Normal University,Xinxiang)
出处
《高等学校化学学报》
SCIE
EI
CAS
1988年第9期976-978,共3页
Chemical Journal of Chinese Universities
关键词
溶出伏安法
测定硒(Ⅳ)
Cathodic stripping voltairmetry
Deleron
mina1iSelcnium(Ⅳ)
