利用衰减全反射傅里叶红外光谱法对掺假橄榄油进行了快速鉴别研究。对掺入转基因大豆油、非转基因大豆油、花生油、玉米油、葵花籽油、调和油等的橄榄油采用160 ℃高温加热8 h处理,通过观察样品加热前、后二阶导数光谱在988 cm-1处特征吸收峰的吸光度变化,准确鉴别橄榄油是否掺假。该方法操作简便、前处理无需有机试剂,可作为市场筛查掺假橄榄油的快速鉴别方法。

FT-IRS with attenuated total reflection (ATR) was applied to the rapid discrimination of adulteration of olive oil. Samples of olive oil mixed with transgenic and non-transgenic, soybean oil, peanut oil, corn oil, sunflower oil or blended oil were heated at 160 ℃for 8 h, on the base of the difference in absorption peaks at 988 cm-1 shown in the 2nd derivative spectra obtained before and after heating, adulteration of olive oil was determined. The proposed method has the special features of simple and easy in pre-treatment without using organic reagents, and feasible for use in rapid discrimination of adulterated olive oil on market.