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环境土壤中多元素同时测定,化学方法仍感困难。等离子光源特别是感耦等离子体光源应用于发射光谱,使多元素同时测定出现了新的飞跃。本文采用色散率大并配有微型电子计算机的ICP-中阶梯光栅光量计,测定不同地层土壤中Zn、Pb、Cd、Cr、Cu等微量元素,回收率在97～105%,相对标准偏差<4%。一元素干扰与光谱背景影响环境土壤样品中主要必测元素为Zn、Pb、Cd、Cr、Cu。对于低浓度Pb、Cd,一般光谱法测定时,其结果常不够理想。我们要测定的土壤样品中Al普遍存在,一般在10%左右,试验中发现Al对Pb 2203A的测定有影响,使Pb的测定结果偏高1～2倍;Al对Pb4057A影响不明显。Ca含量在土壤中约为10~(-1)
Simultaneous determination of multiple elements in the soil environment, the chemical method is still difficult. Plasma light sources, especially inductively coupled plasma light sources, have been used in emission spectroscopy to make new leaps in the simultaneous determination of multiple elements. In this paper, the trace elements Zn, Pb, Cd, Cr, Cu and other trace elements in different soil layers were determined by using ICP-Ladder Grating Spectrometer with large dispersion rate and equipped with microcomputer. The recovery rate was between 97 and 105% with the relative standard deviation < 4%. One element interference and spectral background affect the environment The main soil test elements to be Zn, Pb, Cd, Cr, Cu. For low concentrations of Pb, Cd, the general spectrometry method, the results often unsatisfactory. Al is common in soil samples, generally about 10%. Al was found to have an effect on the determination of Pb 2203A, which resulted in a 1 to 2 times higher Pb concentration. Al had no obvious effect on Pb4057A. Ca content in soil is about 10 ~ (-1)