Square Wave Voltammetry Determination of Trace Chromium in Sprouts at the Bismuth Film Electrode

In order to achieve the new exploration of trace chromium in sprouts square wave voltammetry is used.Under the condition of the best parameters obtained by orthogonal experiments,the concentration of Cr(Ⅵ) are linear with the peak current in the range of 0.1 μg/L-200 μg/L;and the detection limit of Cr(Ⅵ)is 0.001 μg/L.Under the best conditions,trace chromium is determined,and the contents is 2.824 mg/kg.According to the parallel experiment and recovery of standard experiment,it shows that this determination method has a relatively high precision and recovery rate.The results are satisfactory and the value of the practical application is high.