期刊
FOOD CHEMISTRY
卷 212, 期 -, 页码 469-475出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.05.168
关键词
FT-IR spectroscopic imaging; NIR spectroscopy; MIR spectroscopy; Attenuated total reflection; Areca nut
资金
- National Natural Science Foundation of China [31370556]
- China Postdoctoral Science Foundation [2015M571015]
Fourier transform near-infrared (NIR) and mid-infrared (MIR) imaging techniques are essential tools to characterize the chemical morphology of plant. The transmission imaging mode is mostly used to obtain easy-to-interpret spectra with high signal-to-noise ratio. However, the native chemical compositions and physical structures of plant samples may be altered when they are microtomed for the transmission tests. For the direct characterization of thick plant samples, the combination of the reflection NIR imaging and the attenuated total reflection (ATR) MIR imaging is proposed in this research. First, the reflection NIR imaging method can explore the whole sample quickly to find out typical regions in small sizes. Next, each small typical region can be measured by the ATR-MIR imaging method to reveal the molecular structures and spatial distributions of compounds of interest. As an example, the chemical morphology of Areca nut section is characterized directly by the above approach. (C) 2016 Elsevier Ltd. All rights reserved.
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