| 光谱学与光谱分析 |
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| Study on Infrared Spectrum Change of Ganoderma Lucidum and Its Extracts |
| CHEN Zao-xin1, XU Yong-qun2*, CHEN Xiao-kang2, HUANG Dong-lan2, LU Wen-guan2 |
| 1. Faculty of Chemistry and Light Engineering，Guangdong University of Technology，Guangzhou 510006, China2. School of Chemistry and Environmental Engineering, Shaoguan University，Shaoguan 512005, China |
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Abstract From the determination of the infrared spectra of four substances (original ganoderma lucidum and ganoderma lucidum water extract, 95% ethanol extract and petroleum ether extract), it was found that the infrared spectrum can carry systematic chemical information and basically reflects the distribution of each component of the analyte. Ganoderma lucidum and its extracts can be distinguished according to the absorption peak area ratio of 3 416~3 279, 1 541 and 723 cm-1 to 2 935～2 852 cm-1. A method of calculating the information entropy of the sample set with Euclidean distance was proposed, the relationship between the information entropy and the amount of chemical information carried by the sample set was discussed, and the authors come to a conclusion that sample set of original ganoderma lucidum carry the most abundant chemical information. The infrared spectrum set of original ganoderma lucidum has better clustering effect on ganoderma atrum, Cyan ganoderma, ganoderma multiplicatum and ganoderma lucidum when making hierarchical cluster analysis of 4 sample set. The results show that infrared spectrum carries the chemical information of the material structure and closely relates to the chemical composition of the system. The higher the value of information entropy, the much richer the chemical information and the more the benefit for pattern recognition. This study has a guidance function to the construction of the sample set in pattern recognition.
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Received: 2012-08-22
Accepted: 2012-10-30
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Corresponding Authors:
XU Yong-qun
E-mail: xyqun@sina.com
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