摘要
在0.2mol·L-1的甲酸 甲酸钠缓冲液(pH3.5)中,硒(Ⅳ)于-0.70V(vs.SCE)处有一灵敏的极谱波。在1×10-5～0.5g·L-1范围内峰电流与其浓度呈线性关系,检出限为1×10-6g·L-1,加标回收率为95.0%～114.5%,相对标准偏差为4.44%～7.39%。方法适于试样中微量硒的测定。
In a 0.2mol·L^(-1) acetate buffer medium of pH 3.5, selenium(Ⅳ) gives a sensitive polarographic wave at -0.70V (vs. SCE). The peak currents (i_p) keep a linear relationship with the concentrations of Se(Ⅳ) in the range of 1×10^(-5)～0.5g of Se(Ⅳ) perliter. Detection limit of this method attained to a value of 1×10^(-6)g·L^(-1), and recoveries obtained were in the range of 95.0%～114.5%. Precision tests carried out in the concentrations within the working curve gave values of RSD in the range of 4.44%～7.39%. This method has been satisfactorily applied to the analysis of some practical samples containing microamounts of selenium.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2004年第3期153-154,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
硒(Ⅳ)
示波极谱法
含量测定
甲酸-甲酸钠缓冲液
Oscillopolarography
Selenium(Ⅳ)
Water sample
Tea sample
Standard reference material
