计算分光光度法同时测定铁、铝、钪

Simultaneous Determination of Fe,Al,Sc with a Modified Matrix Spectrophotometry

基于铬天青 S- CTMAB-丙酮与 Fe、Al、Sc的显色体系中各组分吸收光谱灵敏度高 ,而选择性差的特点 ,本文提出了一种改进矩阵法 ,并同时测定了合成样中三组分的含量 ,取得了满意结果。

Based on the singular value decomposition (SVD) of absorbance matrix and the pseudoinverse A +,a modified matrix algoritim was developed,in which the optimal calibration matrix is determined by the PRESS of the calibration set.The algorithm combined with chromazurol S CTMAB actone high sensitive color system is used to simultaneously determine the trace amount of Fe,Al,Sc in their mixtures,the relative error of Fe,Al,Sc are 3.5%,9% and 13% respectively.