| Abstract: In order to prevent and control of soil pollution with heavy metal elements, maintain ecological balance and protect human health, a simple, rapid, accurate and quantitative analysis method of soil heavy metal contents was explored. The pretreatment technology of seven heavy metal elements (Cr, Cu, Zn, As, Cd, Pb and Hg) in soil standard samples by the method of microwave digestion and ICP-MS was studied. The results showed that in the analysis of seven heavy metal elements in different soil standard samples, the usage and dosage of nitric acid + hydrofluoric acid systems were different. The determination results of soil standard sample ESS-7a in nitric acid + hydrofl uoric acid (6 mL+3 mL in predigestion, 3 mL+0 mL in redigestion) and soil standard sample ESS-8a in nitric acid + hydrofl uoric acid (5 mL+2 mL in predigestion, 3 mL+0 mL in redigestion) systems were basically consistent with the standard values. These two methods were using less acid, simple and quick, less environmental pollution, high accuracy and precision, so they could be used as pretreatment methods for simultaneous determination of these seven elements. |