Detection of virgin olive oil adulteration using low field unilateral NMR.
The detection of adulteration in edible oils is a concern in the food industry, especially for the higher priced virgin olive oils. This article presents a low field unilateral nuclear magnetic resonance (NMR) method for the detection of the adulteration of virgin olive oil that can be performed through sealed bottles providing a non-destructive screening technique. Adulterations of an extra virgin olive oil with different percentages of sunflower oil and red palm oil were measured with a commercial unilateral instrument, the profile NMR-Mouse. The NMR signal was processed using a 2-dimensional Inverse Laplace transformation to analyze the transverse relaxation and self-diffusion behaviors of different oils. The obtained results demonstrated the feasibility of detecting adulterations of olive oil with percentages of at least 10% of sunflower and red palm oils.
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing 400044, China. pinexz@163.com.
Zheng
Z
Xu
School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK. rob.morris@ntu.ac.uk.
Robert H
RH
Morris
School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK. martin.bencsik@ntu.ac.uk.
Martin
M
Bencsik
School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK. michael.newton@ntu.ac.uk.
Michael I
MI
Newton
D004058:Diffusion; D005504:Food Analysis / Q000379:methods*; D060526:Magnetic Fields; D009682:Magnetic Resonance Spectroscopy; D000069463:Olive Oil; D000073878:Palm Oil; D010938:Plant Oils / Q000032:analysis*; D000074242:Sunflower Oil
D000069463:Olive Oil; D010938:Plant Oils; D000074242:Sunflower Oil; D000073878:Palm Oil