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目的:引入分光测色计,将中药材性状品质这一经验指标数据化,依据获取的中药材颜色信息实现对中药材品种的鉴别,为研究中药鉴定共性技术问题提供一种新的方法及思路。方法:以陈皮为研究对象,在全国范围内收集陈皮药材,采用色度学分析方法获取陈皮颜色特征参数,通过统计分析,建立陈皮品种鉴别的数学预测模型和90%参考值范围。结果:建立了基于L*a*b*色度空间的陈皮药材品种鉴别的数学判别模型,其判别符合率为100%,双侧90%参考值范围分别为陈皮:L*(66.621 5~73.916 5),b*(29.329 5~52.211 0);广陈皮:L*(53.950 0~63.260 0),b*(24.610 0~30.770 0)。结论:实验证明分光测色计获取的颜色信息可实现陈皮药材品种的鉴别,采用色度学分析方法对中药品种鉴别具有一定的可行性。
OBJECTIVE: To introduce a spectrophotometer to digitize the empirical index of traits and qualities of Chinese herbal medicines, to identify the varieties of Chinese herbal medicines based on the obtained color information of Chinese herbal medicines, and to provide a new method and idea for studying common technical problems of identification of traditional Chinese medicines . Methods: The dried tangerine peel was taken as the research object, the dried tangerine peel was collected nationwide, the color characteristic parameters of tangerine peel were obtained by the method of colorimetry, and the mathematic prediction model and the reference range of 90% of the tangerine peel were established by statistical analysis. Results: The mathematic model for identification of dried tangerine peel cultivars based on L * a * b * chromaticity space was established. The discriminant coincidence rate was 100%, and the reference range of 90% on both sides were tangerine peel: L * (66.621 5 ~ 73.916 5), b * (29.329 5 ~ 52.211 0); guancai skin: L * (53.950 0 ~ 63.260 0), b * (24.610 0 ~ 30.770 0). Conclusion: The experiment proves that the color information obtained by spectrophotometer can distinguish the cultivars of dried tangerine peel, and it is feasible to identify the varieties of Chinese traditional medicines by the method of chromatographic analysis.