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
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.
［1］贾洪锋, 邓红, 梁爱华. 电子鼻在芝麻油掺芝麻油香精识别中的应用［J］.中国粮油学报,2013,28(8):83-86.
［2］任小娜, 毕艳兰, 彭丹, 等. 粒子群最小二乘支持向量机结合偏最小二乘法用于芝麻油质量的鉴别［J］. 分析化学, 2013,41(9):1366-1372.
［3］杨佳,武彦文,李冰宁, 等. 近红外光谱结合化学计量学研究芝麻油的真伪与掺伪［J］. 中国粮油学报, 2014,29(3):114-119.
［4］彭翠红,王少玲,徐永群,等. 荧光光谱法快速鉴别花生油、芝麻油和调和油［J］. 光谱实验室, 2012,29(2):750-756.
［5］Bro R. PARAFAC. Tutorial and applications［J］. Chemomemcs and Intelligent Laboratory Systems,1997,38（2）:149-171.
［6］Bro R, Kiers H A L. A new efficient method for determining the number of components in PARAFAC models［J］. Journal of Chemometrics, 2003,17（5）: 274-286.
［7］Tomasi G, Bro R. PARAFAC and missing values［J］. Chemometrics and Intelligent Laboratory Systems, 2005,75（2）:163-180.
［8］杨丽丽, 王玉田, 鲁信琼. 水中石油类污染物的光纤荧光在线测量技术研究［J］.计量学报,2014,35(4):393-397.
［9］Chen Z P, Liu Z, Cao Y Z, et al. Efficient way to estimate the optimum number of factors for trilinear decomposition［J］. Analytica Chemica Acta, 2001, 444(2):295-307.
［10］Valderrama P, Maro P H, Locquet N, et al. A procedure to facilitate the choice of the number of factors in multi-way data analysis applied to the natural samples: Application to monitoring the thermal degradation of oils using front-face fluorescence spectroscopy［J］. Chemometrics and Intelligent Laboratory Systems, 2011,106(2):166-172.
［11］Tena N, Aparicio R, García-González D L. Chemical changes of thermoxidized virgin olive oil determined by excitation–emissionfluorescence spectroscopy (EEFS)［J］. Food Research International, 2012,45(1):103-108.
2016, Vol. 37 
