吸附溶出伏安法测定痕量钛

DETERMINATION OF TRACE TITANIUM BY ADSORPTIVE STRIPPING VOLTAMMETRY

本文研究了用吸附溶出伏安法测定痕量钛的新方法,提出了测定最优条件。测定手续简单,灵敏度高,最低检测限为0.04ng/ml 铁。该法用于高纯铝标准样品中痕量铁的测定,结果与标准值相符。

This paper reports a sensitive new method for determination of trace Ti^(4+) ion by ad- sorptive stripping voltammetry.In 0.1mol/L (NH_4)_2SO_4,0.1mol/L Urotropin,4()10^(-4) mol/L Cupferron and 8% Ethanol (pH=2.0) solution,the tri-complex of Ti^(4+)-cupferron-urotropin is ad- sorped and preconcentrated on stationary mecury electrode with open electric circuiit,then stripping scan carried out from -0.25—-1.0V at seep rate 100mV/s.A sensitive peak is observed at -0.75V and is proportional to Ti^(4+) ion concentration in the range of 0.04-1.0ng/ml.This method was applied to detect trace Titanium in pure Aluminium of standard samples and the results correspand to standard values.