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目的:建立多维共有峰率和变异峰率双指标序列远红外指纹图谱分析自然铜。方法:利用共有峰率和变异峰率2个指标,以不同产地、批次自然铜样品的远红外指纹图谱为标准,计算所测样品相对于对照品的共有峰率和变异峰率。并按照共有峰率的大小,建立不同的序列。结果:分析结果表明,产地相同的S3与S4;S5,S6与S7;S8与S9有比较高的共有峰率和比较低的变异峰率;安徽产地的S1与其他批次样品相似度普遍要低一些。结论:该方法可以准确地区分鉴别不同产地、批次的自然铜,是一种符合中药自身特点的光谱指纹图谱分析方法。
OBJECTIVE: To establish a dual-index sequence of multi-dimensional common peak and mutation peak rate far infrared fingerprinting analysis of natural copper. Methods: Using the two indexes of common peak rate and peak variation rate, the far infrared fingerprint of natural copper samples of different producing areas and batches was taken as the standard to calculate the common peak rate and peak variation rate of the measured samples relative to the reference substance. And in accordance with the size of the total peak rate, the establishment of different sequences. Results: The results showed that there was a higher common peak and a lower peak variation rate in S3 and S4, S5, S6 and S7, S8 and S9 with the same origin. The similarity of samples from other batches in S1 originating in Anhui Province was generally Lower. Conclusion: This method can accurately distinguish and identify natural copper from different producing areas and batches. It is a spectral fingerprint analysis method that accords with the characteristics of Chinese medicine.