title: [Common and variant peak ratios in IR fingerprint of ilex kudingcha with duel-index sequence analysis].
abstract: In the present article, 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 Ilex Kudingcha sample s IR fingerprint spectra were set up and the common peak ratio sequences were arranged in order of size in comparision with other samples. As a result, the method could be used to distinguish Ilex Kudingcha of different areas and classes. The duel-index sequential analysis enables us to distinct two or more herb's IR fingerprints. It is a new method to analyze IR fingerprint spectra, and can used in line with the characteristics of traditional Chinese medicine.
authors.affiliation: Center of Analysis and Test, Shanxi Normal University, Linfen 041004, China.
authors.forename: Tao-tao
authors.initials: TT
authors.lastname: Pang
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Du
mesh_terms: D030017:Ilex / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*