本文系统地研究了4,4′-二(二乙氨基)-二苯硫酮(BDPTK)与Pt~(2+)的显色反应。与该试剂和Au~(3+)、Pd~(2+)、Ag~+的反应不同,BDPTK与Pt~(2+)的反应需当抗坏血酸存在并加热的条件下才能顺利进行。反应在HAc-NaAc介质中,沸水浴加热15分钟,摩尔吸光系数可达1.29×10~5。对铂来说,这是少有的高灵敏显色反应之一。有色配合物在PH～3.3形成之后,不被强酸破坏,室温下,显色溶液的吸光度可稳定24小时。EDTA、NH_4F对该 This article systematically studied the color reaction of 4,4’-bis (diethylamino) -diphenylthione (BDPTK) with Pt 2+. Unlike the reaction of Au ~ (3 +), Pd ~ (2 +) and Ag ~ +, the reaction between BDPTK and Pt ~ (2+) should be carried out smoothly with the presence of ascorbic acid and heating. The reaction in HAc-NaAc medium, boiling water bath heating 15 minutes, the molar absorption coefficient up to 1.29 × 10 ~ 5. For platinum, this is one of the rare high-sensitivity color reactions. Non-ferrous complexes are not destroyed by strong acid after the formation of PH ~ 3.3. The absorbance of the chromogenic solution can be stable for 24 hours at room temperature. EDTA, NH_4F to this