ICP-AES直接测定土壤、沉积物中常、微量元素的光谱干扰和校正方法研究  

Studies on Spectral Interferences and Correction in Simultaneous Determination of Multielements in Sediments with ICP-AES

作　　者：李芳[1] 杨秀环[1] 唐宝英[1] 刘洪涛 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》2000年第4期501-506,共6页Spectroscopy and Spectral Analysis

摘　　要：本文研究了感耦等离子体原子发射光谱 (ICP AES)法直接测定土壤、沉积物中常、微量元素的光谱干扰 ,以及用多元光谱拟合 (MSF)校正的方法。讨论了积分时间及谱线漂移对MSF法的影响。比较了离峰扣背景法与MSF法的效果 ,对水系沉积物GBW 0 73 0 6测定结果表明 ,MSF法得出的结果更接近推荐值 ,且其检出限及相对标准偏差比离峰扣背景法分别改善了 1 3～ 9 0倍和 1 1～ 4 9倍。Spectral interferences in the simultaneous determination of multielements in sediments and soil by ICP AES were investigated and the multicomponent spectral fitting (MSF) method was used for the correction.Several factors affecting the MSF method such as the signal integration time and the spectra shift were studied.The comparison between MSF and off peak background correction were made by analyzing national standard reference material:sediment GBW07306.The detection limit and the precision could be improved by a factor of 1 3—9 0 and 1 1—4 9 respectively and the results agreed better with those of the certified values when using MSF correction.

关 键 词：土壤 沉积物 光谱干扰 ICP-AES 元素测定 

分 类 号：S151.93[农业科学—土壤学] O657.31[农业科学—农业基础科学]