微型柱现场预富集流动注射火焰原子吸收测定环境水样中的铅和镉  

Determination of Pb and Cd in Environmental Water Sample by On-Line Mini-Column Preconcentration and Flow Injection-Flame Atomic Absorption Spectrometry

作　　者：王爱霞[1] 郭黎平[1] 吴冬梅[1] 

机构地区：[1]东北师范大学分析测试中心,吉林长春130024

出　　处：《光谱学与光谱分析》2006年第7期1345-1348,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50473032)资助项目

摘　　要：文章以负载8-羟基喹啉(8-HQ,Oxine)、二乙基二硫代氨基甲酸盐(DDTC)和吡咯啶二硫代氨基甲酸铵(APDC)三种螯合剂的活性炭(AC)为微型柱的吸附材料,采用微型柱现场采样(MFS)分析技术实现了连续现场富集环境水样中的痕量Pb和Cd,并在实验室中采用流动注射(FI)-火焰原子吸收(FAAS)联用技术对吸附柱中富集的Pb和Cd进行测定。该方法用于水中微量元素(GBW—08608)和南湖水样中Pb和Cd的测定均获得了满意的结果。10 mL富集的检出限(3)σPb:1.58μg.L-1;Cd:0.062μg.L-1,相对标准偏差Pb:1.62%;Cd:1.96%。Trace Pb and Cd in environmental water samples were preconcentrted and determined by on-line mini-column field sampling and flow injection-flame atomic absorption spectrometry（FI-FAAS）, and the adsorption materials of the column were activated carbon loaded 8-HQ, DDTC and APDC. Satisfactory results of the determination of Pb and Cd in the certified reference materials（trace elements in water GBW 08608） and the South lake water were obtained by using the above method. The detection limit of 10 mL enrichment of Pb and CA was 1.58 and 0. 062μg·L^-1 , respectively, and the relative standard deviation of Pb and Cd was 1.62% and 1.96% respectively.

关 键 词：微型柱现场采样 流动注射-火焰原子吸收 8-羟基喹啉 二乙基二硫代氨基甲酸钠 吡咯啶二硫代氨基甲酸铵 铅 镉 

分 类 号：O657.3[理学—分析化学]