目的建立正品桑白皮与易混淆品种的红外光谱指纹谱。方法采用红外光谱指纹谱分析法。结果不同来源的正品桑白皮的指纹光谱基本归纳为3类,混淆品种为5种类型。归纳其指纹谱特征,以共有的(1627±7)cm-1吸收峰的透射率(Ts)为基准,在指纹区(1026±5)cm-1处的吸收峰为特征吸收峰,它的透射率为Ti,求出相对透射率为Tr(Tr=Ti/Ts)。结论Tr<1,特征吸收峰单峰者为正品桑白皮。Tr<1,特征吸收峰单峰或Tr<1,特征吸收峰双峰者为混淆品种。

Object To establish the IR spectrometry fingerprint of the certified root bark of Morusalba L.(RBMA)and its confusable species,so as to identify them.Methods The infrared spectrometry was used.Results Three types of fingerprint were obtained from certified RBMA from different productive area and five types of fingerprint obtained from confusable species.These spectra were analyzed and the transmittance of (1627±7)cm-1 of fingerprint area was taken as the standardabsorbed peak(Ts)and the transmittance of(1026±5)cm-1 of fingerprint area as the characteristic obsorbed peak (COP,Ti),the relative transmittance(Tr) was calculated by the formula Tr=Ti/Ts.Conclusion The testedsamples of which Tr < 1 and the COP with single peak was regard as certified RBMA, the samples of which Tr > 1 and COP was single peak or Tr < 1 and COP with double peaks was considered as confusable species.

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