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提出了结合小波变换的偏最小二乘法（ ＷＰＬＳ） ， 即先对光谱信号进行小波变换， 去除噪声， 再用偏最小二乘法对多组分同时测定。 将该法用于模拟体系及复方甲硝唑注射液体系， 结果表明， 该法优于偏最小二乘法。
The partial least squares (WPLS) method combined with wavelet transform is proposed, that is, the spectral signal is first transformed into wavelet to remove the noise, then the partial least square method is used to measure the multi - components at the same time. The method was applied to the simulation system and compound metronidazole injection system, the results show that the method is better than partial least squares.