School of Life Sciences, Beijing Univ. of Chinese Medicine, Beijing, 100029, China.
School of Chinese Materia Medica, Beijing Univ. of Chinese Medicine, Beijing, 102488, China.
J Food Sci. 2018 Jun;83(6):1605-1612. doi: 10.1111/1750-3841.14190. Epub 2018 May 22.
Extra virgin olive oil has been one of the most common targets for economically motivated food adulteration. This research employed the hand-held FTIR spectrometer to develop the simple and portable screening methods for extra virgin olive oils adulterated with other cheaper vegetable oils. With the help of the ATR probe and chemometrics tools, oil samples can be measured directly without any pretreatment, then the spectra can be interpreted automatically to determine the possibility of adulteration and estimate the content of adulterant oil. A feasibility study of the hand-held FTIR screening method was carried out using olive oils adulterated with canola oil, peanut oil, corn oil, soybean oil, and sunflower oil. The SIMCA model using the hand-held FTIR spectra can identify different kinds of vegetable oils correctly and recognize olive oils with not less than 10% of adulterant oils. Meanwhile, the content of adulterant oil in the range of 5% to 45% can be estimated by the PLS model using the hand-held FTIR spectra within an error of 3%. This research shows the potential of the hand-held FTIR technique in the rapid and field screening of olive oils adulterated with some cheaper vegetable oils.
This research provide a rapid and automatic detection method for olive oils adulterated with other cheaper vegetable oils. An oil sample can be measured directly within one minute, and the hand-held instrument can be used anywhere needed.
特级初榨橄榄油一直是最常见的经济动机食品掺假目标之一。本研究采用手持傅里叶变换红外（FTIR）光谱仪，开发了用于检测特级初榨橄榄油掺假其他廉价植物油的简单便携筛选方法。借助 ATR 探头和化学计量学工具，可以直接测量油样而无需任何预处理，然后自动解释光谱以确定掺假的可能性并估算掺杂物油的含量。使用掺有菜籽油、花生油、玉米油、大豆油和葵花籽油的橄榄油进行了手持 FTIR 筛选方法的可行性研究。使用手持 FTIR 光谱的 SIMCA 模型可以正确识别不同种类的植物油，并识别出掺有不少于 10%掺杂物油的橄榄油。同时，使用手持 FTIR 光谱的 PLS 模型可以在 3%的误差范围内估算掺杂物油含量在 5%至 45%的范围内。本研究表明，手持 FTIR 技术在快速现场筛选掺有一些廉价植物油的橄榄油方面具有潜力。
本研究为检测橄榄油掺假其他廉价植物油提供了一种快速自动的检测方法。可以在一分钟内直接测量油样，并且可以在任何需要的地方使用手持仪器。
