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|Title:||Verification of the Geographical Origin of European Butters Using PTR-MS|
|Authors:||MACATELLI Melina; AKKERMANS Wies; KOOT Alex; BUCHGRABER Manuela; PATERSON Alistair; VAN RUTH Saskia|
|Citation:||JOURNAL OF FOOD COMPOSITION AND ANALYSIS vol. 22 no. 2 p. 169-175|
|Publisher:||ACADEMIC PRESS INC ELSEVIER SCIENCE|
|Type:||Articles in periodicals and books|
|Abstract:||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 of 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 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 nation state. 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 correctly predicted in the cross validation. The success rate for prediction of the nation states, averaged over all dichotomous models, was 88% but large differences between nation states were observed. Additional work is required to study the underlying factors that determine geographical differences in butter volatile compositions.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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