Amberlite XAD-2键合双硫腙螯合树脂现场预富集测定水中痕量铅  

In Situ Preconcentration and Determination of Trace Lead in Water Sample with Amberlite XAD-2 Functionalized with Dithizone

作　　者：王爱霞[1] 吴冬梅[1] 谢文兵[2] 郭黎平[1] 

机构地区：[1]东北师范大学分析测试中心,长春130024 [2]中国科学院长春应用化学研究所,长春130022

出　　处：《分析化学》2006年第9期1315-1318,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.50473032)

摘　　要：以Amberlite XAD-2树脂与双硫腙通过N N基键合的形式合成了一种新型螯合树脂(XAD-H2DZ),采用IR和TGA技术对其特性进行了表征,并将其应用于微柱现场在线采样(MFS)新技术中,实现了环境水样中痕量铅的在线原位预富集和实验室中流动注射-火焰原子吸收(FI-FAAS)系统的联机测定。当采样体积为10和50 mL时,其富集因子分别为78和384倍;检出限(3σ)分别为0.32和0.079μg/L;相对标准偏差(n=7)分别为2.0%和1.9%。对环境水样标准物质(GBW 08608)、海水中微量元素标准物质(GBW(E)080040)和实际样品(大连老虎滩区域海水以及南湖水)中铅进行分析,均获得了满意的结果。A new chelating resin（ XAD- H2Dz） was synthesized by coupling Amberlite XAD-2 functionalized with dithizone （H2Dz） through a --N=N- group, characterized by thermogravimetric analysis （TGA） and infrared （IR） spectra, and was used to on-line minicolumn field sampling （MFS）technique. Trace lead in environmental water samples was preconcentrated in site and determined by flow injection-flame atomic absorption spectrometry （FI-FAAS）. The enrichment factors of 78 and 384 were obtained for 10 and 50 mL of sampling volumes, respectively, and the detection limit （3σ） was 0.32 and 0.079 μg/L, respectively, and relative standard deviation （ n = 7） was 2.0% and 1.9% at the same conditions, respectively. The method was successfully applied to the determination of lead in the certified reference materials （GBW （E）080040, GBW08608） and in environmental water samples from the Dalian Lahutan and the South lake, the result was satisfactory.

关 键 词：键合双硫腙螯合树脂 微柱现场在线采样技术 火焰原子吸收 环境水样 铅 

分 类 号：O661.1[理学—分析化学]