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Sensors 2014, 14(2), 2028-2035; doi:10.3390/s140202028

Detection of Virgin Olive Oil Adulteration Using Low Field Unilateral NMR

1,* , 2
1 State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing 400044, China 2 School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
* Author to whom correspondence should be addressed.
Received: 29 November 2013 / Revised: 20 January 2014 / Accepted: 23 January 2014 / Published: 24 January 2014
(This article belongs to the Special Issue Magnetic Resonance Sensors)
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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.
Keywords: adulteration; olive oil; unilateral NMR Mouse; transverse relaxation; diffusion adulteration; olive oil; unilateral NMR Mouse; transverse relaxation; diffusion
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Xu, Z.; Morris, R.H.; Bencsik, M.; Newton, M.I. Detection of Virgin Olive Oil Adulteration Using Low Field Unilateral NMR. Sensors 2014, 14, 2028-2035.

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