Trace determination of molybdenum using a catalytic current in differential-pulse polarography

Abstract

The differential-pulse polarographic determination of molybdenum(VI) coupled with a catalytic homogeneous reaction was carried out in a system containing the molybdenum-ferron complex and an oxidant in acetic-acetate buffer. On addition of the powerful oxidant, the peak current for the reduction of the molybdenum(VI) complex was increased significantly. The calibration graph was linear in the concentration range 1 × 10-6 -1 × 10-7 M and the detection limit was 9.5 ng ml-1. © 1991.