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The role of comprehensive two-dimensional gas chromatography in mineral oil determination

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Abstract

Mineral oil hydrocarbons (MOH) contain a wide structural diversity of molecules, for which the reference method of analysis is the online coupled liquid chromatography-gas chromatography with flame ionization detection (LC-GC-FID). These compounds are very heterogeneous from a toxicological viewpoint, and an accurate risk assessment when dealing with a MOH contamination can only be performed if sufficient information is available on the types of structures present (i.e., number of carbons, degree of alkylation, number of aromatic rings). Unfortunately, the separation performances of the current LC-GC-FID method are insufficient for such characterization, not even mentioning the possible coelution of interfering compounds which additionally hinder MOH determination. Comprehensive two-dimensional gas chromatography (GC × GC), while mostly used for confirmation purposes in the past, starts to prove its relevance for overcoming the weaknesses of the LC-GC method and reaching even better the analytical requirements defined in the latest EFSA opinion. The present paper therefore aims at highlighting how GC × GC has contributed to the understanding of the MOH topic, how it has developed to meet the requirements of MOH determination, and how it could play a role in the field for overcoming many of the current analytical and toxicological challenges related to the topic.

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Acknowledgements

This work is supported by Fonds de la Recherche Scientifique Belgique (FNRS) (PDR projects-ToxAnaMOH, T.0187.23).

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  1. Analytical Chemistry Lab, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Bât. G1 Chimie Des Agro-Biosystèmes, Passage Des Déportés 2, 5030, Gembloux, Belgium

    Grégory Bauwens, Aleksandra Gorska & Giorgia Purcaro

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Bauwens, G., Gorska, A. & Purcaro, G. The role of comprehensive two-dimensional gas chromatography in mineral oil determination. Anal Bioanal Chem 415, 5067–5082 (2023). https://doi.org/10.1007/s00216-023-04718-3

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