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首页> 外文期刊>Journal of the Korean Chemical Society >Organic Precipitate Flotation of Trace Metallic Elements with Ammonium Pyrrolidinedithiocarbamate(). Determination of Bismuth, Cadmium, Cobalt and Lead in Water Samples by Coprecipitation-Flotation with Cu-pyrrolidinedithiocarbamate
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Organic Precipitate Flotation of Trace Metallic Elements with Ammonium Pyrrolidinedithiocarbamate(). Determination of Bismuth, Cadmium, Cobalt and Lead in Water Samples by Coprecipitation-Flotation with Cu-pyrrolidinedithiocarbamate

机译：吡咯烷二硫代氨基甲酸铵对痕量金属元素的有机沉淀浮选。铜-吡咯烷二硫代氨基甲酸酯共沉淀-浮选法测定水样中的铋，镉，钴和铅

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The organic precipitate flotation using Cu(￥±)-pyrrolidinedithiocarbamate complex as a coprecipitant was studied for the preconcentration and determination of trace Cd, Pb, Bi and Co in several water samples. Experimental conditions such as pH of solution, amounts of Cu(￥±) and ammonium pyrrolidinedithiocarbamate(APDC), stirring time, the type and amount of surfactant, etc. were optimized for the effective flotation of analytes. After 3.0 mL of 1,000 ￥ìg/mL Cu(￥±) solution was added to 1.00 L water sample, the pH of the solution was adjusted to 2.5 with HNO3 solution. Trace amounts of analytes were coprecipitated by adding 2.0% APDC solution. And the precipitates were flotated onto the surface of solution with the aid of nitrogen gas and sodium lauryl sulfate. The floats were collected from mother liquor, and filtered through the micropore glass filter by suction. The precipitates were dissolved with 4 mL conc. HNO3, and then diluted to 25.00 mL with deionized water. The analytes were determined by graphite furnace atomic absorption spectrophotometry. This flotation technique was applied to the analysis of some water samples, and the 90 to 120% of recoveries were obtained from the spiked samples, this procedure could be concluded to be simple and applicable for the trace element analysis in various kinds of water.
机译：研究了以铜（±）-吡咯烷二硫代氨基甲酸酯络合物为共沉淀剂进行有机沉淀浮选的方法，用于多种水中样品中痕量镉，铅，铋和钴的富集和测定。优化了溶液的pH，Cu（￥±）和吡咯烷二硫代氨基甲酸铵（APDC）的量，搅拌时间，表面活性剂的类型和量等实验条件，以有效地浮选分析物。将3.0 mL的1,000 ￥ g / mL Cu（￥±）溶液添加到1.00 L的水样品中后，用HNO3溶液将溶液的pH值调节至2.5。加入2.0％APDC溶液可共沉淀痕量分析物。然后借助氮气和十二烷基硫酸钠将沉淀物浮选到溶液表面。从母液中收集浮标，并通过微孔玻璃过滤器抽滤。将沉淀物用4mL浓溶液溶解。 HNO3，然后用去离子水稀释至25.00 mL。通过石墨炉原子吸收分光光度法测定分析物。将该浮选技术应用于一些水样的分析，加标样品的回收率达到90％至120％，可以认为该方法简单易行，可用于各种水中的痕量元素分析。

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