| 光谱学与光谱分析 |
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| A Study of Boletus Bicolor from Different Areas Using Fourier Transform Infrared Spectrometry |
| ZHOU Zai-jin1,2，LIU Gang1*，REN Xian-pei1 |
1. School of Physics and Electronic Information, Yunnan Normal University, Kunming 650092, China
2. Department of Computing Sciences, Huaiyin Institute of Technology, Huai’an 223001, China |
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Abstract It is hard to differentiate the same species of wild growing mushrooms from different areas by macromorphological features. In this paper, Fourier transform infrared (FTIR) spectroscopy combined with principal component analysis was used to identify 58 samples of boletus bicolor from five different areas. Based on the fingerprint infrared spectrum of boletus bicolor samples, principal component analysis was conducted on 58 boletus bicolor spectra in the range of 1 350-750 cm-1 using the statistical software SPSS 13.0. According to the result, the accumulated contributing ratio of the first three principal components accounts for 88.87％. They included almost all the information of samples. The two-dimensional projection plot using first and second principal component is a satisfactory clustering effect for the classification and discrimination of boletus bicolor. All boletus bicolor samples were divided into five groups with a classification accuracy of 98.3％. The study demonstrated that wild growing boletus bicolor at species level from different areas can be identified by FTIR spectra combined with principal components analysis.
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Received: 2009-05-18
Accepted: 2009-08-26
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Corresponding Authors:
LIU Gang
E-mail: gliu66@163.com
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