双硫腙-离子液体萃取-火焰原子吸收法测定铅  

Dithizone-ionic Liquid Extraction-lead Determination by Flame Atomic Absorption Spectroscopy Method

作　　者：王惠[1] 袁梦倩[1] 韩木先[1] 

机构地区：[1]湖北师范学院文理学院,湖北黄石435002

出　　处：《甘肃科学学报》2015年第6期46-49,共4页Journal of Gansu Sciences

基　　金：湖北省大学生创新创业训练计划项目(201313256010);湖北师范学院文理学院本科生科研项目(DK201403);湖北省教育厅科研项目(B20132507);湖北省高等学校青年教师深入企业行动计划项目(XD2014233);湖北省自然科学基金项目(2013CFC015)

摘　　要：以双硫腙鳌合-离子液体(1-丁基-3-甲基咪唑六氟磷酸盐)体系萃取铅,通过火焰原子吸收法测定。考察了体系pH值、Pb^(2+)与双硫腙的最佳反应摩尔比、反应物的加入顺序、Pb2+的反洗条件等影响因素,并用该体系方法测定了几种市售银耳中Pb^(2+)的含量。实验结果表明,Pb^(2+)检出限(3s/k)为0.71μg/L,加标回收率范围为98.00%~101.00%,相对标准偏差范围为1.96%~2.87%。Lead was abstracted through dithizone chelate-ionic liquid （1-butyl-3-methylimidazolium hexafluorophosphate） system and determined through flame atomic absorption spectroscopy method. The best dithizone reaction molar ratio, reactant adding sequence, Pb2＋ back-washing condition and other influ- ence factors between system pH value and Pb2＋. The system method has also been used to test the content of Pb2＋ in the tremella fuciformis sold in the market. The test result shows that the detection limit of Pb2＋ （3s/k） is 0.71 μg/L,the adding standard recovery ranges from 98. 00% to 101.00%, and the relatively standard difference range,from 1.96% to 2.87%.

关 键 词：离子液体 火焰原子吸收法 铅 

分 类 号：O657.31[理学—分析化学]