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适于萃取一荧光法测定金的已知试剂不多.实际上只有这些试剂:对-二甲氨基亚苄若丹宁,罗丹明C,丁基罗丹明C和罗丹明6Ж.它们的选择性都不好.此外,应用对—二甲氨基亚苄若丹宁测定金含量的范围极小(0.01—0.1微克/毫升).应用罗丹明染料的方法测定金的范围稍大.如用罗丹明C为0.05—5.0微克/毫升,罗丹明6Ж为0.02—1.1微克/毫升.为了提高选择性和降低检出限量,预先用苯萃取出金与三苯甲烷染料的离子缔合物,进而用罗丹明取代三苯甲烷染料.如用丁基罗丹明C可使检出限量达0.001微克/毫升.但这样的方法非常繁杂.
There are not many known reagents that are suitable for the extraction of gold by a fluorescence method, in fact only these reagents: p-dimethylaminobenzanidine, rhodamine C, butylrhodamine C and rhodamine 6Ж. Their selectivity Is not good.In addition, the application of p-dimethylaminobenzanidine determination of the gold content of a very small range (0.01-0.1 micrograms / ml) .Radamine dye method to determine the gold range slightly larger, such as rhodamine 0.05-5.0 μg / ml for C and 0.02-1.1 μg / ml for rhodamine 6 eps To improve the selectivity and reduce the detection limit, the ion-association of gold and triphenylmethane dye was extracted with benzene beforehand, Displacement of triphenylmethane dyes, such as butyl rhodamine C can limit the detection limit up to 0.001 micrograms / ml, but this method is very complicated.