高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (6): 1041.

• 研究简报 • 上一篇    下一篇

FI-KR-FAAS在线预浓集系统中螯合剂的选择

陈树榆, 张志锋, 余华明   

  1. 中国科学技术大学结构分析重点实验室, 合肥 230026
  • 收稿日期:2001-03-06 出版日期:2002-06-24 发布日期:2002-06-24
  • 通讯作者: 陈树榆(1941年出生),女,教授,从事原子光谱分析研究.

Chelator Selection in FI-KR-FAAS on-line Preconcentration System

CHEN Shu-Yu, ZHANG Zhi-Feng, YU Hua-Ming   

  1. Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China
  • Received:2001-03-06 Online:2002-06-24 Published:2002-06-24

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

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%.

Key words: FAAS, FIA, Knotted reactor, Dithione, Heavy metal

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