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Molecules 2010, 15(6), 4227-4241; doi:10.3390/molecules15064227
Article

Evaluation of Carbohydrates in Natural and Cultured Cordyceps by Pressurized Liquid Extraction and Gas Chromatography Coupled with Mass Spectrometry

1, 1,2 and 1,*
1 Institute of Chinese Medical Sciences, University of Macau, Macao, China 2 Department of Pharmaceutics, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
* Author to whom correspondence should be addressed.
Received: 31 May 2010 / Revised: 9 June 2010 / Accepted: 10 June 2010 / Published: 11 June 2010
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Abstract

Free and polymeric carbohydrates in Cordyceps, a valued edible mushroom and well-known traditional Chinese medicine, were determined using stepwise pressurized liquid extraction (PLE) extraction and GC-MS. Based on the optimized PLE conditions, acid hydrolysis and derivatization, ten monosaccharides, namely rhamnose, ribose, arabinose, xylose, mannose, glucose, galactose, mannitol, fructose and sorbose in 13 samples of natural and cultured Cordyceps were qualitatively and quantitatively analyzed and compared with myo-inositol hexaacetate as internal standard. The results showed that natural C. sinensis contained more than 7.99% free mannitol and a small amount of glucose, while its polysaccharides were usually composed of mannose, glucose and galactose with a molar ratio of 1.00:16.61~3.82:1.60~1.28. However, mannitol in cultured C. sinensis and cultured C. militaris were less than 5.83%, and free glucose was only detected in a few samples, while their polysaccharides were mainly composed of mannose, glucose and galactose with molar ratios of 1.00:3.01~1.09:3.30~1.05 and 1.00:2.86~1.28:1.07~0.78, respectively. Natural and cultured Cordyceps could be discriminated by hierarchical clustering analysis based on its free carbohydrate contents.
Keywords: Cordyceps; carbohydrates; polysaccharides; pressurized liquid extraction (PLE); GC–MS Cordyceps; carbohydrates; polysaccharides; pressurized liquid extraction (PLE); GC–MS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Guan, J.; Yang, F.-Q.; Li, S.-P. Evaluation of Carbohydrates in Natural and Cultured Cordyceps by Pressurized Liquid Extraction and Gas Chromatography Coupled with Mass Spectrometry. Molecules 2010, 15, 4227-4241.

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