| 光谱学与光谱分析 |
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| Infrared Spectroscopic Analysis of Guilin Watermelon Frost Products |
| HUANG Dong-lan1, CHEN Xiao-kang1*, XU Yong-qun1, SUN Su-qin2, ZHOU Qun2, LU Wen-guan1 |
1. Department of Chemistry, Shaoguan College, Shaoguan 512005, China
2. Department of Chemistry, Tsinghua University, Beijing 100084, China |
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Abstract The objective of the present study is to analyze different products of Guilin watermelon frost by Fourier transform infrared spectroscopy (FTIR), second derivative infrared spectroscopy and two-dimensional correlation spectroscopy (2D-IR) under thermal perturbation. The structural information of the samples indicates that samples from the same factory but of different brands had some dissimilarities in the IR spectra, and the type and content of accessories of them were different compared with conventional IR spectra of samples, peaks at 638 and 616 cm-1 all arise from anhydrous sodium sulfate in watermelon frost spray and watermelon frost capsule; the characteristic absorption peaks of the sucrose, dextrin or other accessories can be seen clearly in the spectra of watermelon frost throat-clearing buccal tablets, watermelon frost throat tablets and watermelon frost lozenge. And the IR spectra of watermelon frost lozenge is very similar to the IR spectra of sucrose, so it can be easily proved that the content of sucrose in watermelon frost lozenge is high. In the 2D-IR correlation spectra, the samples presented the differences in the position, number and relative intensity of autopeaks and correlation peak clusters. Consequently, the macroscopical fingerprint characters of FTIR, second derivative infrared spectra and 2D-IR spectra can not only provide the information about main chemical constituents in medical materials, but also analyze and identify the type and content of accessories in Guilin watermelon frost. In conclusion, the multi-steps IR macro-fingerprint method is rapid, effective, visual and accurate for pharmaceutical research.
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Received: 2012-01-06
Accepted: 2012-03-15
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Corresponding Authors:
CHEN Xiao-kang
E-mail: chk5710@126.com
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