目的:应用电子鼻方法区分不同产地的南五味子药材,为在实际应用中南五味子药材的产地判断提供新方法。方法:通过单因素试验及正交试验确定南五味子电子鼻测定的最佳试验条件。应用主成分分析、主成分分析结合线性判别分析2种分析方法来...目的:应用电子鼻方法区分不同产地的南五味子药材,为在实际应用中南五味子药材的产地判断提供新方法。方法:通过单因素试验及正交试验确定南五味子电子鼻测定的最佳试验条件。应用主成分分析、主成分分析结合线性判别分析2种分析方法来区分不同产地的南五味子。结果:研究结果表明,电子鼻测定南五味子影响因素由大到小依次为室温放置时间>称样量>进气量;电子鼻测定南五味子的最佳参数组合为称样量5.0 g进气量100 m L·min-1,样品室温放置时间10min;验证实验结果表明,在最佳条件下测定南五味子,样品区分度可以达到0.986。主成分分析法对不同产地的南五味子有一定的区分能力,但甘肃省华亭县、徽县江洛镇、武都区3个产地的南五味子区分结果不明显;主成分分析法结合线性判别分析法对不同产地的南五味子区分能力优于主成分分析法,区分结果显著,在本实验中能够很好地区分甘肃省华亭县、徽县江洛镇、武都区3个产地的南五味子。结论:该研究利用南五味子的特殊气味运用电子鼻对不同产地的南五味子作了细致的区分,区分效果显著,对以后快速、客观、简便、绿色的鉴别不同产地的南五味子药材提供了新思路,新方法。展开更多
Objective:Poria cocos and Polyporus umbellatus are similar medicinal fungi in traditional Chinese medicines.A method for fingerprint analysis of monosaccharide composition of polysaccharides by HPLC combined with chem...Objective:Poria cocos and Polyporus umbellatus are similar medicinal fungi in traditional Chinese medicines.A method for fingerprint analysis of monosaccharide composition of polysaccharides by HPLC combined with chemometrics methods has been developed for characterization and discrimination of them in this research.Methods:The polysaccharides were extracted by decocting in water,and then completely hydrolyzed with hydrochloride.Monosaccharides in the hydrolyzates were derivatized with 1-phenyl-3-methyl-5-pyrazolone(PMP)for HPLC analysis.More than 20 batches of P.cocos and P.umbellatus from different regions were analyzed.Results:The fingerprints of P.cocos showed five common characteristic peaks,which were identified by comparing with the reference substances.The five peaks corresponded to the derivatives of mannose,ribose,glucose,galactose,and fucose.At the same time,the fingerprints of P.umbellatus showed eight common characteristic peaks,of which seven were identified as the derivatives of mannose,ribose,rhamnose,glucose,galactose,xylose,and fucose.Moreover,the similarity of their fingerprints was respectively calculated by the Similarity Evaluation System for Chromatographic Fingerprint of TCM published by China Pharmacopoeia Committee(Version 2004 A).And the data were further processed by hierarchical cluster analysis(HCA)and principal component analysis(PCA).The similarity evaluation and HCA indicated that there were no significant difference in P.cocos or P.umbellatus samples from different geographical regions,but PCA was performed to characterize the difference in monosaccharide constituents between P.cocos and P.umbellatus,and linear discriminant analysis(LDA)showed the overall correct classification rate was 100%.Conclusion:The fingerprint analysis method of monosaccharide composition of water-soluble polysaccharides can distinguish P.cocos and P.umbellatus,and can be applied for the authentication or quality control for P.cocos and P.umbellatus.展开更多
文摘目的:应用电子鼻方法区分不同产地的南五味子药材,为在实际应用中南五味子药材的产地判断提供新方法。方法:通过单因素试验及正交试验确定南五味子电子鼻测定的最佳试验条件。应用主成分分析、主成分分析结合线性判别分析2种分析方法来区分不同产地的南五味子。结果:研究结果表明,电子鼻测定南五味子影响因素由大到小依次为室温放置时间>称样量>进气量;电子鼻测定南五味子的最佳参数组合为称样量5.0 g进气量100 m L·min-1,样品室温放置时间10min;验证实验结果表明,在最佳条件下测定南五味子,样品区分度可以达到0.986。主成分分析法对不同产地的南五味子有一定的区分能力,但甘肃省华亭县、徽县江洛镇、武都区3个产地的南五味子区分结果不明显;主成分分析法结合线性判别分析法对不同产地的南五味子区分能力优于主成分分析法,区分结果显著,在本实验中能够很好地区分甘肃省华亭县、徽县江洛镇、武都区3个产地的南五味子。结论:该研究利用南五味子的特殊气味运用电子鼻对不同产地的南五味子作了细致的区分,区分效果显著,对以后快速、客观、简便、绿色的鉴别不同产地的南五味子药材提供了新思路,新方法。
基金supported by Shanghai Biotechnology Support Project(Grant No.16401900800)National Science and Technology Project(Grant No.2018ZX09721003-009-011).
文摘Objective:Poria cocos and Polyporus umbellatus are similar medicinal fungi in traditional Chinese medicines.A method for fingerprint analysis of monosaccharide composition of polysaccharides by HPLC combined with chemometrics methods has been developed for characterization and discrimination of them in this research.Methods:The polysaccharides were extracted by decocting in water,and then completely hydrolyzed with hydrochloride.Monosaccharides in the hydrolyzates were derivatized with 1-phenyl-3-methyl-5-pyrazolone(PMP)for HPLC analysis.More than 20 batches of P.cocos and P.umbellatus from different regions were analyzed.Results:The fingerprints of P.cocos showed five common characteristic peaks,which were identified by comparing with the reference substances.The five peaks corresponded to the derivatives of mannose,ribose,glucose,galactose,and fucose.At the same time,the fingerprints of P.umbellatus showed eight common characteristic peaks,of which seven were identified as the derivatives of mannose,ribose,rhamnose,glucose,galactose,xylose,and fucose.Moreover,the similarity of their fingerprints was respectively calculated by the Similarity Evaluation System for Chromatographic Fingerprint of TCM published by China Pharmacopoeia Committee(Version 2004 A).And the data were further processed by hierarchical cluster analysis(HCA)and principal component analysis(PCA).The similarity evaluation and HCA indicated that there were no significant difference in P.cocos or P.umbellatus samples from different geographical regions,but PCA was performed to characterize the difference in monosaccharide constituents between P.cocos and P.umbellatus,and linear discriminant analysis(LDA)showed the overall correct classification rate was 100%.Conclusion:The fingerprint analysis method of monosaccharide composition of water-soluble polysaccharides can distinguish P.cocos and P.umbellatus,and can be applied for the authentication or quality control for P.cocos and P.umbellatus.