Differential Pulse Polarographic Determination of Nitrate in AUT Solution

Abstract

Key Word Index-Differential pulse polarography; 0.5 M CaCL as supporting electrolyte; nitrate analysis in AUT solution.A differential pulse polarographic method for the determination of nitrate ion has been developed, W i t h 0.5 M CaCI, a s supporting electrolyte, NO; is reduced to give a peak with E1/2=--1.836 Volt US. the Ag/AgCl electrode. The differential pulse polarographic peak height is proportional t o the nitrate concentration from 20 to 6 0 p p m . The detection limit for nitrate is 2 p p m in pure aqueous solution. I n the determination of 40 ppm nitrate a relative precision (relative standard