Rapid screening of commercial extra virgin olive oil products for authenticity: Performance of a handheld NIR device

Abstract

The performance of a handheld near infrared spectroscopic device was evaluated for the rapid screening of extra virgin olive oil for authenticity. Without any sample preparation, the spectra of authentic reference extra virgin olive oils, refined olive oils, potential adulterants consisting of edible oils, extra virgin olive oil spiked with adulterants, and a total of 93 commercial olive oil products were each rapidly (10 s) measured in the transflection mode. The univariate conformity index and the multivariate supervised soft independent modeling of class analogy classification tools were used to differentiate among the various oils investigated. Out of 88 commercial products labeled extra virgin olive oil, 39 (44%) were classified as belonging to the class of authentic extra virgin olive oils. The results were compared to those recently reported for analyses carried out with a benchtop Fourier transform-near infrared spectrometer.

Keywords

Rapid screening olive oil authentication portable NIR Device

Get full access to this article

View all access options for this article.

References

Karunathilaka

Fardin Kia

A-R

Srigley

. Nontargeted, rapid Screening of extra virgin olive oil products for authenticity using near-infrared spectroscopy in combination with conformity index and multivariate statistical analyses. J Food Sci 2016; 81: C2390–C2397.

Azizian

Mossoba

Fardin-Kia

. Novel, rapid identification and quantification of adulterants in extra virgin olive oil using near-infrared spectroscopy and chemometrics. Lipids 2015; 50: 705–718.

Plugge

Van der Vlies

. The use of near infrared spectroscopy in the quality control laboratory of the pharmaceutical industry. J Pharm Biomed Anal 1992; 10: 797–803.

Frankel EN, Mailer RJ, Wang SC, et al. Evaluation of extra-virgin olive oil sold in California. Davis, CA: UC Davis Olive Center at the Robert Mondavi Institute, 2011.