FI-KR-FAAS在线预浓集系统中螯合剂的选择  

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

作　　者：陈树榆[1] 张志锋[1] 余华明[1] 

机构地区：[1]中国科学技术大学结构分析重点实验室,合肥230026

出　　处：《高等学校化学学报》2002年第6期1041-1043,共3页Chemical Journal of Chinese Universities

摘　　要：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%.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%.

关 键 词：在线预浓集系统 螯合剂 火焰原子吸收 流动注射分析 编织反应器 双硫腙 重金属 光谱分析 

分 类 号：O657.31[理学—分析化学]