同步荧光光谱法快速鉴别食用油

Rapid Discrimination of Edible Oils by Synchronous Fluorescence Spectroscopy

利用同步荧光光谱法鉴别沙棘果油、沙棘籽油、核桃油、菜籽油、芝麻油、亚麻仁油.结果显示：不同食用油荧光光谱具有明显的差异,在激发波长250～720nm范围内,沙棘果油、沙棘籽油、核桃油、亚麻仁油、芝麻油和菜籽油的最大激发波长范围分别为315～450、520～650、315～490、300～500、300～550、300～490nm.在激发光与发射光波长差为90nm、激发波长250～720nm的条件下,对6种不同食用油进行同步荧光扫描,利用主成分分析得分图可以直观、快速地区分鉴别各种食用油.

This paper describes a comparative analysis of the total synchronous fluorescence （TSyF） spectra of seabuckthorn fruit oil,seabuckthorn seed oil,walnut oil,rapeseed oil,sesame oil and linseed oil.TSyF spectra were acquired by varying the excitation wavelength in the region of 250-720 nm.Six kinds of vegetable oils can be discriminated from each other based on their TSyF spectra.The maximum excitation wavelengths of seabuckthorn fruit oil,seabuckthorn seed oil,walnut oil,rapeseed oil,sesame oil and linseed oil were 315-450,520-650,315-490,300-500,300-550 and 300-490 nm,respectively.The principal component analysis was used to successfully discriminate among these vegetable oils.Thus,this study has established a fast and simple technique for the detection of seabuckthorn fruit oil,sea buckthom seed oil,walnut oil,rapeseed oil and sesame oil and linseed oil.