【摘要】 依据离子浮选分离法的摹本原理,提出了用分光光度法测定水中痕量镉的方法。用聚氧化乙烯(23)月桂醚作镉离子的捕收剂,快速而选择性地富集于气液界面,在最佳的体系条件下,取水样1L,检测限可低至0.03μg,相对标准偏差为10.2％,标准加入回收率达90％～110％,分析一次样品仅需40min。更多还原

【Abstract】 Ion flotation followed by spectrophotometric determination of trace cadmium in water is reported. It’s based on the formation of complex from cadmium through reaction with polyoxyethylene (23) lauryl ether as a collector. Cadmium is rapidly and selectively collected into gas-liquid interface. Under the optimum conditions established, down to 0.03ug of Cd in 1 liter of sample can be determined. The precision of the ion flotation-spectrophotornetric procedure, expressed in terms of relative standard deviation is 10.2%. The standard addition recovery of Cd was 90~110%. Analysis can be carried out in about 40 minutes.更多还原