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,均获得了满意结果,本文还对此体系的伏安行为 Determination of trace selenium by cathodic stripping voltammetry has been reported, but the accuracy is not good, the sensitivity is not enough. In this paper, the determination of selenium by hydrochloric acid and copper system was studied. Under appropriate conditions, the concentration range of selenium was 0.04 ~ 20ng / mL, the detection limit was pg / mL, the selenium content was 0.14ng / mL and the coefficient of variation was less than 10%. The proposed method has been used to determine the water content in selenium-rich areas and grain and human hair with higher selenium content, and satisfactory results have been obtained. In addition, the voltammetric behavior of this system