自然铜远红外指纹图谱共有峰率和变异峰率双指标序列分析法

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.

Dual-index sequence analysis of common and variant peak ratio in far-infrared fingerprint of Pyritum

Objective : To set up the dual-indexes sequence analytical method for far-infrared fingerprint in which the dual indexes are common peak ratio and variant ration. Method : Two new indexes, common peak ratio and variant peak ratio, were applied and their values were calculated by means of sequential analysis, in which each Pyritum sample's far-infrared fingerprint spectra were set up and the common peak ratio sequences were arranged in order of size in comparision with other samples. Result : The analytical results suggested that samples S3 and S4, S5, S6 and S7, S8 and S9 from the same region showed higher common peak ratio and lower variant peak ratio. However, the sample S1 from Anhui showed little similarity with others. Conclusion : The method, applied to distinguish Pyritum of different areas and batches, is reasonable to characterize of traditional Chinese medicine.