Ag_2S选择性电极用于水中As^(3+)的测定

Determination of As~ (3+) in water by Ag_2S selection electrode

本文对Ag2 S选择性电极 (PAg)用于硝酸银滴定亚砷酸作了初步探讨 ,并与银电极作了对比。实验指出用PAg电极测定亚砷酸的最低浓度可达 5× 10 - 5mol .L- 1 ,而银电极为 5× 10 - 4mol .L- 1 。

In this paper,the author does firstly discussion on being titrated H 3AsO 3 with AgNO 3 by Ag 2S selection electrode and contrasts with Ag electrode.The experiment shows that,the determination of the lowest concentration of H 3AsO 3 with P Ag electrode ups to 5×10 -5 mol.L -1 .while Ag electrode ups to 5×10 -4 mol.L -1 .