摘要
利用固定有双硫腙的活性硅胶萃取色层法富集环境水中痕量铜 ,0 .1mol·L-1盐酸 - 5 0g·L-1硫脲作为洗脱剂 ,火焰原子吸收光谱法测定。研究了富集剂的吸附容量 ,最佳吸附条件和洗脱条件。实验表明 ,该富集剂的使用寿命长达 2 0次 ,富集倍数高达 2 0 0倍 ;对于同浓度水样平行测定 6次 ,其相对标准偏差为 3.2 % ;应用于实际水样分析 ,加标回收率在 95 %～ 110
A water insoluble chelating reagent,dithizone supported on silica gel is used for preconcentration trace of trace amounts of copper in environmental water.Copper retained on the column is completely eluted with 50g·L -1 thiourea in 0.1mol·L -1 hydrochloric acid.The copper content of the water sample is then determined in the eluting solution by FAAS method.Various such as pH,flowrate and eluting conditions were studied.The chelating reagent in the column can be used for 20 times.Enrichment factor found is 200 times.The relative standard deviation is 3.2%.The recoveries for the added standards are between 95%～110%.
出处
《现代科学仪器》
2003年第2期69-70,共2页
Modern Scientific Instruments
