Quantitative detection of adulterated olive oil by Raman spectroscopy and chemometrics

• DOI: 10.1002/jrs.2933
• Publication Date: 2011-05-02T08:14:34Z
• Authors: Xiao‐Fang Zhang; Ming‐Qiang Zou; Xiao‐Hua Qi; Feng Liu; Cheng Zhang; Feng Yin
• Keywords: Adulterant; Chemometrics; Sunflower oil; Corn oil

Abstract Commercially available extra virgin olive oils are often adulterated with some other cheaper edible similar chemical compositions. A set of oil samples soybean oil, corn and sunflower seed were characterized by Raman spectra in the region 1000–1800 cm −1 . Based on intensity vibrational bands normalized band at 1441 (CH 2 ), external standard method (ESM) was employed for quantitative analysis, which compared results achieved support vector machine (SVM) methods. By plotting adulterant content versus its corresponding spectrum 1265 , calibration curve obtained. Coefficient determination ( R ) each 0.9956, 0.9915 0.9905 respectively. The mean absolute relative errors calculated as 7.41, 7.78 9.45%, respectively, ESM, while they 5.10, 6.96 4.55, SVM model, prediction accuracy shows that ESM based spectroscopy is a promising technique authentication oil. also has advantages simplicity, time savings non‐requirement sample preprocessing; especially, portable system suitable on‐site testing quality control field applications. Copyright © 2011 John Wiley & Sons, Ltd.