| 光谱学与光谱分析 |
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| Qualitative Analysis of Fragrant Pear Class Based on Near Infrared Diffuse Reflectance Spectroscopy |
| MA Ben-xue1, 2, RAO Xiu-qin1*, YING Yi-bin1，SHEN Fei1, FAN Yu-xia1 |
1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
2. College of Machinery and Electric Engineering, Shihezi University, Shihezi 832003, China |
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Abstract A method was developed to automatically discriminate the persistent calyx fruit and fruit without calyx of fragrant pear by means of near infrared spectroscopy (NIRS). The prediction performance of different band regions range, different principal component numbers and different preprocessing methods of the spectra (multiplicative signal correction, standard normal variate, and derivative spectra) together with discriminant analysis (DA) was also investigated, and The calibration model was established to classify the different kinds of fragrant pear. The research results for the fragrant pear classification showed that DA calibration models using these parameters with band regions between 9 091 and 4 000 cm-1 and original spectra are optimal, with the percentage of correct sample classification being 100% and 95% for the calibration and validation set，respectively.
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Received: 2008-11-28
Accepted: 2009-03-02
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Corresponding Authors:
RAO Xiu-qin
E-mail: xqrao@zju.edu.cn
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[2] LU Wan-zhen, YUAN Hong-fu, XU Guang-tong, et al(陆婉珍, 袁洪福, 徐广通，等). Modern Near Infrared Spectroscopy Analytical Technology(现代近红外光谱分析技术). Beijing：China Petrochemical Press(北京：中国石化出版社)，2007. 1.
[3] REN Ying-ying, LI Jiang, QIN Wei-ming(任莹莹，李 疆，覃伟铭). Journal of Xinjiang Agricultural University(新疆农业大学学报)，2007，30(1)：25.
[4] XU Lu，SHAO Xue-guang(许 禄，邵学广). Methods of Chemometrics(化学计量学方法). Beijing：Science Press(北京：科学出版社)，2007. 137.
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