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对制何首乌及其伪品进行了IR光谱及UV导数光谱的测定。结果表明，二者的IR和UV吸收光谱完全不同，不可混用；根据其光谱特征可将两者快速、准确地予以鉴别。
The IR spectra and UV derivative spectra of Polygonum multiflorum and its counterfeit products were determined. The results show that the IR and UV absorption spectra of the two are completely different and can not be mixed; according to their spectral characteristics, they can be quickly and accurately identified.