[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.


METHODS
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.


RESULTS
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.


CONCLUSIONS
The method, applied to distinguish Pyritum of different areas and batches, is reasonable to characterize of traditional Chinese medicine.
Anhui College of Chinese Traditional Medicine, Wuhu 241000, China. huanglp_@126.com
Liping
L
Huang
Jing
J
Wu
D007501:Iron / Q000032:analysis* / Q000737:chemistry; D008516:Medicine, Chinese Traditional; D010449:Peptide Mapping; D011786:Quality Control; D020539:Sequence Analysis, Protein; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013440:Sulfides / Q000032:analysis* / Q000737:chemistry
D013440:Sulfides; C011342:pyrite; D007501:Iron