示波极谱滴定在炸药分析中的应用——Ⅲ.PbN_6测定时干扰的消除

Application of Oscillopolarographic Titration to Analysis of Dynamite——(Ⅲ) Elimination of Interference in the Determination of PbN_6

示波极谱滴定PbN_6可以在铂丝电极上进行,但由于此种电极表面的极化性质与吸附特性不适应的原因,不能用于滴定含有有机物质的混合炸药。将213型铂电极代替铂丝电极作为工作电极,在1.1～1.6V范围内滴定,终点突跃明显,拟定的PbN_6分析方法获得满意效果。

Oscillopohtrographic titration of PbN_6 can be carried out at Pt-wire electrode. This Pt-eletrode, however, is not suitable for the titration of organiccontaining dynamite mixtures because of the surface polarization and adsorption properties of the electrode. Instead, a type of 213 Pt-electrode was used as the working electrode and satisfactory results were obtained in the voltage range from 1.1～1.6V, and an obvious titration end point was shown. This newly developed analytical pattern for PbN_6 has indicated that it is more accurate, sensitive and reliable than routine methods.