目前文献报导有关汞的分析方法很多,主要的如重量法、硫氰酸盐滴定法、半胱氨酸滴定法、络合剂Ⅲ直接滴定法、碘化钾滴定法等。这些方法离子干扰性较大,且只适用于半微量分析,而对于微量汞的测定则感到困难。双硫腙法在目前工农业的微量汞分析中是较为满意和常用的一种方法。最近盖尔勋斯等(A.)提出用秋兰姆铜测定农药中微量汞的方法,结果良好。本文提出借二乙氨基硫代甲酸铜比色测定微量汞的方法,是根据试剂的苯溶液与Hg~(++)离子形成无色稳定的络合物,从而使褐黄色的试剂苯溶液的颜色减弱来进行比色测定。经过我们多次实验,认为本法有如下的一些优点: At present, there are many mercury analysis methods reported in the literature, such as gravimetric method, thiocyanate titration method, cysteine ​​titration method, direct titration of complexing agent III and titration of potassium iodide. These methods have large ion interference and are only suitable for semi-microanalysis, but difficult for the determination of trace mercury. Dithizone method in the current industrial and agricultural trace mercury analysis is more satisfactory and commonly used method. Recently, Guellxun et al. (A.) proposed a method for the determination of trace mercury in pesticides using thiuram, and the results were good. In this paper, a method for the determination of trace mercury by copper diethylamino thiocarbonic acid colorimetric method is based on the reagent benzene solution and Hg ~ (++) ions to form a colorless and stable complex, so brown yellow reagent benzene solution Weaker color for colorimetric determination. After our many experiments, I think this law has some advantages as follows: