数学方法在原子吸收光谱分析中的应用——测定三氧化钨中铬

来源期刊：中南大学学报(自然科学版)1991年第6期

论文作者：范健 罗重庆 艾星涛

文章页码：109 - 114

关键词：数学方法; 原子吸收光谱法; 干扰效应校正; 铬; 三氧化钨

Key words：mathematical method; atomic absorption spectroscopy; elimination of interferent effect; correction of analytical result; chromium; tungsten trioxide

摘    要：本文研究了基体元素钨对原子吸收光谱法测定微量铬的干扰影响,选用适当的高次方程对其干扰曲线进行拟合。利用一系列含有已知含量钨的铬标准溶液的实验数据,用回归分析求得方程系数。以此通过对高次方程求解即可求得三氧化钨试样中铬的准确结果,该法适用于类似干扰存在下的其他元素的准确测定.

Abstract: The interferent effect of matrix tungsten on atomic absorption spectrome-try for chromium was studied. A mathematical model was estabilshed accordingto the interferent curve of tungsten on the determination of chromium. Thecharacteristic coefficents in the equation may be estimated by multinomialregression on the basis of experimental data. The corrected concentration ofchromium in tungsten trioxide may be found from equation by the Newton-Raphsou iteration metlbod. The approach can be used for the computationalelimination of interferent effect and for correction of analytical results