光度法测金的显色剂较多,目前已报道的有甲基紫、乙基紫、结晶紫、孔雀绿、亮绿、亚甲蓝、尼尔蓝、罗丹明B、打萨腙、邻甲基联苯胺,N,N＇-四甲基-邻甲基联苯胺和硫代米氏酮等等。其中以硫代米氏酮的灵敏度最高(ε=1.6×10~6)。由于金在地壳中的含量极低,而光度法又是野外地质普查中的重要测试手段,因此,寻找高灵敏度的试剂是有意义的。硫代米氏酮首先由Cheng等用作光度法测金的显色剂。我们设想,如果以活性更强的 Spectrophotometric determination of gold more color agents, has been reported to have methyl violet, ethyl violet, crystal violet, malachite green, bright green, methylene blue, nile blue, rhodamine B, Methyl benzidine, N, N’-tetramethyl-o-methylbenzidine and thiomyl ketone, and the like. Among them, the sensitivity of thiomyl ketone was the highest (ε = 1.6 × 10 ~ 6). Because gold is extremely low in the earth’s crust, and photometry is an important test in field geology, it is instructive to look for highly sensitive reagents. Thiomyl ketone was first used by Cheng et al as a photometric gold assay reagent. We envision, if more active