分析生物样品中微量金属元素首先要解决如何分解样品的问题。干法分解无论采取高温或低温灰化,均不能避免汞、铬等部分元素的损失,且存在溶融的硅酸盐和碳吸附待测成分的问题。湿法主要采用硝酸或由硝酸、硫酸、高氯酸等组成的混酸分解样品,成分损失远较干法为少,已成为分解生物样品的主要方法。但湿法需长时间的开放式加 Analysis of trace metal elements in biological samples must first solve the problem of how to decompose the sample. Dry decomposition Whether high temperature or low temperature ashing, are not able to avoid mercury, chromium and other elements of the loss, and the presence of dissolved silicate and carbon adsorption component of the problem. The wet method mainly uses nitric acid or mixed acid decomposition sample composed of nitric acid, sulfuric acid, perchloric acid and the like, the loss of components is far less than that of the dry method, and has become the main method for decomposing biological samples. However, the wet method requires a long time open plus