采用密闭法进行乙醇胺羟基铂的消解，用氯化亚锡光度法进行样品中铂的测定。实验表明，在160℃聚四氟乙烯密闭消解罐中，用12 mL HNO3-3 mL H2O2经6 h可消解3 mL样品；在盐酸介质中，Pt(IV)与SnCl2反应生成稳定的橙黄色络合物，在波长403 nm处进行分光光度法测定，铂量在0~20 mg/L范围内符合朗伯-比尔定律。对乙醇胺羟基铂样品中35.82~42.55 g/L 铂进行测定，相对标准偏差(RSD)和样品加标准回收率分别为0.072%~0.11%和99.3%~102.8%，与电流滴定法和氯铂酸铵重量法的测定结果吻合。
Using the sealed digestion method of ethanolamine hydroxyl platinum, and content of platinum in sample was determined by SnCl2 spectrophotometry. The results showed that 3 mL ptoctanoate tlimer sample could be digested completely with 12 mL HNO3 and 3 mL H2O2 at 160℃in a PTFE Jar for 6 h. In hydrochloric acid medium, Pt(IV)-SnCl2 forms a orange stable complex with stannous chloride. The platinum sample was determined by spectrophotometry at the wavelength of 403 nm, the result shows Beer’s Law is obeyed in the range of 0~20 mg/L. The samples of hydroxyl ethanolamine platinum were determined for Pt content from 35.8~42.55 g/L, the relative standard deviations (RSD) and the recoveries of standard addtion are 0.072%~0.11%and 99.3%~102.8%, respectively. The result is coincided with that of the amperometric titration and ammonium chloroplatinate gravimetry.
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