Title: Raman Spectra of Vegetables and Fruits at Two Excitation Wavelengths
Abstract: The Raman spectra of vegetables and fruits were studied by micro-Raman spectroscopy at 514.5nm excitation, and near-infrared Fourier transform Raman (FT-Raman) at 1064nm. It is shown that at 514.5nm excitation, most of the spectra recorded on the surface of vegetables and fruits are from that of carotene, and the fluorescence is very strong in some cases. While at 1064nm excitation wavelength,the spectra show that different samples demonstrate different characteristic Raman spectra without fluorescence. Thus, one can analyses the effective compositions in these vegetables and fruits by FT-Raman, while under 514.5nm excitation, the only spectra from carotene provide a great convenience for detecting other components left on the surface of vegetables and fruits, such as pesticide.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 1
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