Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15126
Title: Rapid differentiation of Panax ginseng and Panax quinguefolius by matrix-assisted laser desorption/ionization mass spectrometry
Authors: Lai, YH
So, PK
Lo, SCL 
Ng, EWY
Poon, TCW
Yao, ZP 
Keywords: MALDI-MS
Differentiation
Herbal medicine
Panax ginseng
Panax quinquefolius
Issue Date: 2012
Publisher: Elsevier
Source: Analytica chimica acta, 2012, v. 753, p. 73-81 How to cite?
Journal: Analytica chimica acta 
Abstract: A matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS)-based method has been developed for rapid differentiation between Panax ginseng and Panax quinquefolius, two herbal medicines with similar chemical and physical properties but different therapeutic effects. This method required only a small quantity of samples, and the herbal medicines were analyzed by MALDI-MS either after a brief extraction step, or directly on the powder form or small pieces of raw samples. The acquired MALDI-MS spectra showed different patterns of ginsenosides and small chemical molecules between P. ginseng and P. quinquefolius, thus allowing unambiguous differentiation between the two Panax species based on the specific ions, intensity ratios of characteristic ions or principal component analysis. The approach could also be used to differentiate red ginseng or P. quinquefolius adulterated with P. ginseng from pure P. ginseng and pure Panax quinquefolium. The intensity ratios of characteristic ions in the MALDI-MS spectra showed high reproducibility and enabled quantitative determination of ginsenosides in the herbal samples and percentage of P. quinquefolius in the adulterated binary mixture. The method is simple, rapid, robust, and can be extended for analysis of other herbal medicines.
URI: http://hdl.handle.net/10397/15126
ISSN: 0003-2670
DOI: 10.1016/j.aca.2012.09.047
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