The result of determining the content of heavy metals of Ca,Cr,Cu Ni and Zn is identical with that of the normal digestion method(HNO 3-HClO 4.

• 重金属元素镉、铬、铜、镍、锌含量测定的结果,与用常规消化方法(硝酸-高氯酸)相吻合。