| FI-KR-FAAS在线预浓集系统中螯合剂的选择 |
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| 引用本文： | 陈树榆,张志锋,余华明.FI-KR-FAAS在线预浓集系统中螯合剂的选择[J].高等学校化学学报,2002,23(6):1041-1043. |
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| 作者姓名： | 陈树榆 张志锋 余华明 |
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| 作者单位： | 中国科学技术大学结构分析重点实验室, 合肥 230026 |
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| 摘 要： | 流动注射 ( FI)在线分离预富集方法与原子光谱技术的联用已成为原子光谱分析的主要发展方向之一1] .方肇伦等 2 ] 首先提出利用 PTFE管编织反应器 ( KR)吸附金属螯合物进行在线预浓集 -火焰原子吸收 ( FAAS)测定的联用技术 ,随后多种有机硫试剂被用作 KR体系的螯合剂 2～ 6 ] .本文研究了双硫腙 ,APDC和 Na DDC用于 FI- KR- FAAS体系的在线预浓集 ,结果表明 ,双硫腙螯合体系具有更好的分析性能 .1 实验部分1 .1 仪器与试剂 PE- 31 0 0原子吸收分光光谱仪 .测定波长均为各元素最灵敏线 ;狭缝宽度 0 .7nm;提升量 4.0 m L/…
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| 关 键 词： | 火焰原子吸收 流动注射分析 编织反应器 双硫腙 重金属 |
| 文章编号： | 0251-0790(2002)06-1041-03 |
| 收稿时间： | 2001-03-06 |
Chelator Selection in FI-KR-FAAS on-line Preconcentration System |
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| CHEN Shu Yu ,ZHANG Zhi Feng,YU Hua Ming.Chelator Selection in FI-KR-FAAS on-line Preconcentration System[J].Chemical Research In Chinese Universities,2002,23(6):1041-1043. |
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| Authors: | CHEN Shu Yu ZHANG Zhi Feng YU Hua Ming |
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| Institution: | Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | The selection of chelators in the pre concentration system Flow Injection Knotted Reactor Flame Atomic Absorption Spectrometry(FI-KR-FAAS) and their corresponding experimental conditions were studied. Dithione was found to have advantages over the other two chelators with a higher concentration efficiency. Interferences from alkali and alkaline earth elements were overcome; mutual interferences between heavy metals were avoided. Concentration factors of 23.4-69.3 were obtained, with the detection limits of 1.61-2.56 μg/L. The method developed was used to determine certified biological reference materials of human hair, pig liver and sea prawn, and the results agreed well with the certified values, relative standard deviations of the determinations were in the range of 2.10%-3.02%. |
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| Keywords: | FAAS FIA Knotted reactor Dithione Heavy metal |
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