Wet Digestion Techniques for Determination of Chromium in Food Sample by Differential Pulse Stripping Voltammetry

Currently, a large amount of harmful heavy metals is discharged into the soil environment, which will eventually affect the quality of food and harm human health through the food chain. Therefore, it is of great theoretical and practical significance to establish an analytical method for the determination of trace heavy metals in food. In this paper, a differential pulse stripping voltammetric method for the determination of chromium in food was established, and the sample was pretreated with a wet digestion method suitable for rapid detection in the field. Finally, this HNO 3 -H 2 O 2 wet digestion electrochemical determination method was evaluated.