Spectrophotometric determination of cobalt with ethylenediaminetetraacetic acid and tert-butyl hydroperoxide

Abstract

A method for the spectrophotometric determination of cobalt with EDTA and tert-butyl hydroperoxide is proposed. The spectrum shows an absorption maximum at 580 nm in basic medium. The effects of amount of reagent, acidity, time and temperature have also been studied. Beer's law is obeyed over the range 50–170 µg ml^–1 of cobalt with a minimum photometric error of 2.91%. The reproducibility, precision and potential interferents have been investigated.