Used the nitric acid and hydrochloric acid reflux digestion and the aqua regia digestion method to digest environmental standard materials of soils before determining of arsenic by inductively coupled plasma-mass spectrometry (ICP-MS), and compared the results. The results showed that the aqua regia digestion method was superior to the nitric acid and hydrochloric acid reflux digestion method.% 采用硝酸-盐酸回流消解法和王水消解法同时前处理环境土壤标准物质，用电感耦合等离子体质谱法(ICP-MS)测定其中砷的含量，对两种方法的消解效果进行对比。结果表明，王水消解法要优于硝酸-盐酸回流消解法。
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