Electrochemical detection of Chromium ( VI)

Abstract

Cr (VI) is a proven carcinogen causing lung cancer, and is a common pollutant in several industrial and laboratory discharges. The conventional methods used for the determination of Cr (VI) fail at trace levels. Recently developed methods that are adapted for this purpose depend entirely upon stripping voltammetry. This requires a Pre-concentration step followed by electrochemical detection. Diphenyl! carbazide, as a cyclic voltammetric sensor, has shown a good selectivity and sensitivity at sub-micromolar concentration range in the detection of Cr (VI).