DETERMINATION OF TRACE TITANIUM IN KH2PO4 BY DIFFERENTIAL PULSE ADSORPTION VOLTAMMETRY

摘要

A sensitive differential pulse adsorption voltammetric method for the determination of trace titanium(IV) in KH2PO4 has been studied based on the formation of the Ti(IV) complex with diphenylguanidine and 4-[(4-diethylamino-2-hydroxy-phenyl)-azo]-5-hydroxynaphthalene-2,7-disulph onic acid (Beryllon III). The reduction peak current of the complex was proportional to the concentration of Ti(IV) in the range 7.3 X 10(-10)-1.2 X 10(-7) mol/l. The detection limit of 1.7 X 10(-10) mol/l can be obtained under optimum experimental conditions. The method was applied to the determination of trace Ti(IV) in KH2PO4 with satisfactory results. [References: 15]