Determination of manganese in grain by potential titration with catalytic end-point indication

摘要

A method of catalytic potential titration for the determination of trace manganese by using crystal violet ion selective electrode is reportedin this paper.It is based on the catalytic effect of manganese (II)on the oxidation of crystal violet by potassium periodate in the presence of nitrilotriacetic acid (NTA).The experiments indicatied that this technique showed high sensitivity and high accuracy.The results of determination of trace manganese in grain could be compared with the results obtaained by means of atomic absorption spectrometry.