小波变换-偏最小二乘法用于苯胺、苯酚和苯甲酸的同时测定

Application of Wavelet Transform-PLS to Simultaneous Determination of Phenol Aniline and Benzoic Acid

将小波变换与偏最小二乘法相结合,对苯酚、苯胺、苯甲酸三组分体系进行同时测定。先对光谱信号进行小波变换,去除噪声后重构信号,再用偏最小二乘法预报样品浓度。结果表明,经小波变换后处理结果回收率明显提高。

The mixture of phenol, aniline and benzoic acid was analyzed by wavelet—partial least squares speetrophotometry method, which was combined with wavelet and partial-least-squares. The spectral signals were transferred and denoised by wavelet transform, and then the components were determined by partial least squares simultaneously. The experimental data showed that the results were better than those determined by partial least squares.