环境水样中镍的微型柱现场预富集流动注射火焰原子吸收测定  

Determination of Ni in Environmental Water Sample Using Mini-column Field Preconcentration and Flow Injection-Flame Atomic Absorption Spectrometry

作　　者：吴冬梅[1] 王爱霞[2] 

机构地区：[1]中国矿业大学煤矿瓦斯治理国家工程研究中心,江苏徐州221008 [2]东北师范大学分析测试中心,吉林长春130024

出　　处：《分析测试学报》2007年第6期855-857,861,共4页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(50473032)

摘　　要：以负载8-羟基喹啉(Oxine)、二乙基二硫代氨基甲酸钠(DDTC)和吡咯啶二硫代氨基甲酸铵(APDC)3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Ni,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Ni进行了测定。该方法用于环境水样中Ni的测定获得了满意的结果。10 mL水富集Ni的检出限(3δ)为2.62μg.L-1,相对标准偏差为1.02%。A method based on the minicolumn field sampling techniques for continuous sampling and preconcentration of trace Ni in environmental water samples was developed. The minicolumn containing activated carbon loaded with Oxine, DDTC and APDC was then incorporated into a flow-injection system for on-line Ni elution and detection by flame atomic absorption spectrometry in the laboratory. The detection limit was 2.62 μg ·L^-1 for a sample volume of l0 mL and the relative standard deviation was 1.02%. The method has been applied to the determination of Ni in environmental water samples with satisfactory results.

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 吡咯啶二硫代氨基甲酸铵 二乙基二疏代 氨基甲酸钠 环境水样 镍 

分 类 号：O614.31[理学—无机化学] U412.6[理学—化学]