| 光谱学与光谱分析 |
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| Near Infrared Raman Spectra Analysis of Rhizoma Dioscoreae |
| LIN Wen-shuo,CHEN Rong*,LI Yong-zeng,FENG Shang-yuan,HUANG Zu-fang,XIE Bing-xian |
| Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Normal University, Fuzhou 350007, China |
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Abstract A novel and compact near-infrared (NIR) Raman system was developed using 785 nm diode laser, volume-phase technology holographic system, and NIR intensified charge-coupled device (CCD). The Raman spectra and first derivative spectra of rhizoma dioscoreae were obtained. The Raman spectra of rhizoma dioscoreae showed three strong characteristic peaks at 477, 863 and 936 cm-1, respectively. The major ingredients are protein, amino acid, starch, polysaccharides and so on, matching the known basic biochemical composition of rhizoma dioscoreae. In the first derivative spectra of rhizoma dioscoreae, the distinguishing characteristic peaks appeared at 467，484，870 and 943 cm-1. Contrasted with rhizoma dioscoreae Raman spectra in the ranges of 600 to 800 cm-1 and 1 000 to 1 400 cm-1, the changes in rhizoma dioscoreae Raman first derivative spectra are represented more clearly than the rhizoma dioscoreae Raman spectra. So the rhizoma dioscoreae Raman first derivative spectra can be an accurate supplementary analysis method to the rhizoma dioscoreae Raman spectra.
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Received: 2007-05-09
Accepted: 2007-08-16
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Corresponding Authors:
CHEN Rong
E-mail: chenr@fjnu.edu.cn
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