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| Application of Fluorescence Spectra and Parallel Factor Analysis to the Discrimination between Sesame Oil and Sesame Essence |
| WU Xi-jun1,TIAN Rui-ling2,DU De-qin1 |
1. Measurement Technology and Instrumentation Key Lab of Hebei Province, Yanshan University, Qinhuangdao, Hebei 066004, China
2. School of Science, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract The fluorescence spectra of twenty-one sesame oil samples and two sesame essence samples are measured with FS920 fluorescence spectrometer. Parallel factor analysis (PARAFAC) is applied to resolve excitation-emission fluorescence matrices (EEM). The factor-number and constituents corresponding to each factor are ascertained. The map feature (peak position, peak value and peak number) are obtained by analyzing synchronous fluorescence spectra of three-dimensional, three-dimensional excitation-emission fluorescence spectra and contour maps. The three-factor excitation and emission profiles and factor relative content plots of PARAFAC model are plotted. These results indicate the capability of the combination of fluorescence spectra techniques and three-factor PARAFAC model to differentiate sesame oils and sesame essence.
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Received: 08 January 2015
Published: 14 October 2016
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2016, Vol. 37 
