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OBJECTIVE To study the changes of main components of Angelica sinensis(A.sinensis) after stir-frying high performance liquid chromatography(HPLC) fingerprint combined with chemometrics. METHODS The HPLC fingerprints of A. sinensis before and after stir-frying were established. The fingerprints were analyzed and evaluated by similarity evaluation,principal component analysis(PCA)and orthogonal partial least squares discriminant analysis(OPLS-DA).The variable importance in the projection(VIP)value> 1 was used as the standard to screen the different components before and after stir-frying of A. sinensis,and paired t-test was performed on the different components. RESULTS There were 20 common peaks in the fingerprints of raw A. sinensis(RAS)and stir-fried A. sinensis(SFAS). After comparison with mixed reference substances, eight chromatographic peaks were identified as tryptophan, chlorogenic acid, ferulic acid, senkyunolide I, senkyunolide H, coniferyl ferulate, ligustilide, and butyliden phthalide.PCA(SFAS)showed that there were specific regions in the spatial distribution of principal components in the samples of RAS and SFAS. OPLS-DA screened out three differential components of ligustilide,senkyunolide I and coniferyl ferulate with VIP value> 1 as the standard.The peak areas of ligustilide,senkyunolide I and coniferyl ferulate were significantly reduced by paired t test (P<0.001). Chemometric analysis could effectively distinguish RAS and SFAS. CONCLUSION The chemical composition of RAS changes to a certain extent after stir-frying with soil.The established HPLC fingerprint had high similarity and could not significantly distinguish between RAS and SFAS. When combining HPLC fingerprint with stoichiometric analysis PCA,OPLS-DA and differential component distribution t test, RAS and SFAS can be obviously distinguished,which provides a reference for studying the processing principle of SFAS as well as data support for subsequent studies on pharmacological effects before and after processing.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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