FAAS直接法测定环境和生物试样中Zn、Pb和Cd  

Direct Determination of Pb,Zn and Cd in Environmental and Biological Samples by FAAS

作　　者：彭荣飞[1] 唐宝英[1] 曾尊祥[1] 杨秀环[1] 张展霞[1] 

机构地区：[1]中山大学化学系,广州510275

出　　处：《光谱学与光谱分析》2001年第1期77-80,共4页Spectroscopy and Spectral Analysis

摘　　要：本文系统研究了海水、土壤、沉积物和生物中Cd、Pb和Zn用火焰原子吸收直接法测定时的干扰与背景校正。由于这些物质基体中含有大量Al、Na、K、Ca、Mg、Fe等元素 ,在火焰中形成MX、MO和MOH分子光谱与分析元素线重叠 ,经背景校正后可获得更准确的结果和更好的回收率 。This paper describes interference and background correction problem of direct determination of Pb,Zn and Cd in soil,sediment,plants, halobios and sea water by FAAS. With the improvement of limit of detection(L.O.D) of instrument, Pb, Zn and Cd in same environmental and biological samples can be analyzed directly by FAAS, but it is worth taking attention that there are quantities of elements which lead to background interference in air-ethyne flame,such as Al,Na,K Ca,Mg and Fe. Compare with no background correction,limit of detection using D-2 lamp background correction is improved by 1.05-4.5 times, the recoveries and the relative standard deviation(R.S.D) are better,standard samples were also analyzed with satisfactory results.

关 键 词：FAAS 火焰原子吸收法 环境试样 生物试样 镉 铅 锌 测定 

分 类 号：O614.24[理学—无机化学] O614.433[理学—化学]