Verification of the geographical origin of European butters using PTR-MS
Macatelli, Melina and Akkermans, Wies and Koot, Alex and Buchgraber, Manuela and Paterson, A. and Van Ruth, Saskia (2009) Verification of the geographical origin of European butters using PTR-MS. Journal of Food Composition and Analysis, 22 (2). pp. 169-175. ISSN 0889-1575 (http://dx.doi.org/10.1016/j.jfca.2008.10.009)
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In the present study, proton transfer reaction-mass spectrometry (PTR-MS) in combination with partial least square-discriminant analysis (PLS-DA) was evaluated as a method for the prediction of the origin of European butters. Eighty-three commercial butters from three European regions were subjected to headspace analysis using PTR-MS. Data were collected for the mass range m/z 20-150 using a dwell time of 0.2 s mass−1, resulting in a cycle time just under 30 s. The log transformed headspace concentrations of the masses were subjected to PLS-DA in order to estimate classification models for the butter samples. One model predicted the region of origin; a second set of models predicted dichotomously whether or not a butter originated from a particular EU country. The performance of each model was evaluated by means of a 10-fold double cross validation procedure. For 76% of the butters the region of origin was predicted correctly in the cross validation. The success rate of the countries, averaged over all dichotomous models, was 88% but large differences between countries were observed. Additional work is required to study the underlying factors that determine the geographical differences in butter volatile compositions.
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Item type: Article ID code: 13265 Dates: DateEventMarch 2009PublishedSubjects: Medicine > Therapeutics. Pharmacology
Medicine > Pharmacy and materia medica
Science > MicrobiologyDepartment: Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences Depositing user: Ms Ann Barker-Myles Date deposited: 14 Oct 2009 10:27 Last modified: 08 Apr 2024 17:11 URI: https://strathprints.strath.ac.uk/id/eprint/13265