摘要
倒数示波计时电位滴定~[1]是最近提出的一种电滴定方法,它把(dE/dt)-E曲线上的切口转变为(dE/dt)^(-1)-E曲线上的峰,从而大大抑制了充电电流,提高了滴定分析的灵敏度.本文报道了微分倒数示波计时电位滴定,即对(dE/dt)^(-1)-E曲线进行一次或二次微分处理,利用示波图上去极剂峰的出现与消失指示终点,使滴定终点更易观察.
A new method called differential reciprocal oscillographic ehronopoientiometric titration is presented,it maked use of appearance or disappearance of a peak of depolarizer on differential reciprocal oseillogram to indicate the end point of titration.This method was applied to the titration of Pb2+,Cd2+,Ni2+,Co2+,Zn2+,Ga3+ and Cu2+ by EDTA or EGTA.The end point of titration is very easy to be observed
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第12期1536-1538,共3页
Chemical Journal of Chinese Universities
关键词
微分
倒数示波计时
电位滴定
Differential reciprocal oseillographic chronopotentiometric titration,Oscillographic atration,Depolarizer
