微量分析是指取数毫克或1—2厘克(cg)样品进行分析其中主要和次要成份。一般,在样品中含量多的称为主要成份,含量少的为次要成份。Sandell认为含量在1—0.01%为次要成份。亦有认为在10—0.01%为次要成份;而含量在0.01%以下称为痕量。由于痕量组份占样品中的百分比低,因此需取大量样 Microanalysis refers to taking a few milligrams or one to two centimeter (cg) of sample for analysis of the major and minor components. In general, more content in the sample as the main ingredient, less content as a secondary ingredient. Sandell that the content of 1-0.01% as a secondary ingredient. It is also believed that 10-0.01% is a minor component; while the content is below 0.01% as a trace. Due to the low percentage of trace components in the sample, a large number of samples are required