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Purification of mineral oil aromatic hydrocarbons and separation based on the number of aromatic rings using a liquid chromatography silica column. An alternative to epoxidation.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Purification of mineral oil aromatic hydrocarbons and separation based on the number of aromatic rings using a liquid chromatography silica column. An alternative to epoxidation.
Συγγραφείς: Gorska, Aleksandra, Bauwens, Grégory, Beccaria, Marco, Purcaro, Giorgia
Πηγή: Journal of Chromatography. A, 1743, 465684 (2025-02-22)
Στοιχεία εκδότη: Elsevier B.V.
Έτος έκδοσης: 2025
Συλλογή: University of Liège: ORBi (Open Repository and Bibliography)
Θεματικοί όροι: Comprehensive gas chromatography, High-performance liquid chromatography, Interferences, Mineral oil aromatic hydrocarbons, Purification, Vegetable oils, Hydrocarbons, Aromatic, Mineral Oil, Plant Oils, Chromatography, Liquid/methods, High Pressure Liquid/methods, Plant Oils/chemistry, Aromatic/analysis, Aromatic/isolation & purification, Mineral Oil/chemistry, Aromatic rings, Sample preparation, Silica column, Analytical Chemistry, Physical, chemical, mathematical & earth Sciences, Chemistry, Life sciences, Food science, Physique, chimie, mathématiques & sciences de la terre
Περιγραφή: peer reviewed ; The analysis of mineral oil aromatic hydrocarbons (MOAH) in vegetable oils is currently associated with high uncertainty due to various factors ranging from sample preparation to data interpretation. One significant factor is the coelution of biogenic compounds of terpenic origin with the MOAH fraction during chromatographic analysis. The common purification method is epoxidation, a chemical reaction that changes the polarity of the interferences, allowing their separation from MOAH. However, this reaction is non-selective and can lead to losses of both MOAH and internal standards. This variation is especially noticeable when using epoxidation procedures with higher reaction kinetics, such as those employing performic acid. MOAH losses also vary depending on their composition, which is unpredictable. Furthermore, 2-methylnaphthalene (2MN) and 1,3,5-tri‑tert-butylbenzene (TBB), which are the common quantification standards, are lost at different rates. As a consequence, the final MOAH quantity will vary both depending on the standard used, and on its initial composition. This work presents a new purification approach based on liquid chromatography fractionation on silica using the same column and eluents as for the usual MOSH/MOAH fractionation. This approach efficiently removes squalene, carotenes, and derivatives, without inducing inconsistent losses between the internal standards and MOAH as epoxidation does. On average, MOAH recovery using this new method was 94% (± 8%) in coconut, palm, sunflower, and olive oil, using different MOAH sources and concentrations. Additionally, perspectives are presented regarding the separate analysis and quantification of mono-/diaromatic MOAH and other polyaromatic MOAH. This is of particular interest as these two sub-fractions are associated with different toxicological properties.
Τύπος εγγράφου: article in journal/newspaper
Γλώσσα: English
ISSN: 0021-9673
1873-3778
Relation: https://api.elsevier.com/content/article/PII:S0021967325000330?httpAccept=text/xml; urn:issn:0021-9673; urn:issn:1873-3778; https://orbi.uliege.be/handle/2268/329222; info:hdl:2268/329222; https://orbi.uliege.be/bitstream/2268/329222/1/Gorska%202025%20HPLC%20purification.pdf; info:pmid:39826280
DOI: 10.1016/j.chroma.2025.465684
Διαθεσιμότητα: https://orbi.uliege.be/handle/2268/329222
https://orbi.uliege.be/bitstream/2268/329222/1/Gorska%202025%20HPLC%20purification.pdf
https://doi.org/10.1016/j.chroma.2025.465684
Rights: open access ; http://purl.org/coar/access_right/c_abf2 ; info:eu-repo/semantics/openAccess
Αριθμός Καταχώρησης: edsbas.FE6D6F03
Βάση Δεδομένων: BASE
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  Data: peer reviewed ; The analysis of mineral oil aromatic hydrocarbons (MOAH) in vegetable oils is currently associated with high uncertainty due to various factors ranging from sample preparation to data interpretation. One significant factor is the coelution of biogenic compounds of terpenic origin with the MOAH fraction during chromatographic analysis. The common purification method is epoxidation, a chemical reaction that changes the polarity of the interferences, allowing their separation from MOAH. However, this reaction is non-selective and can lead to losses of both MOAH and internal standards. This variation is especially noticeable when using epoxidation procedures with higher reaction kinetics, such as those employing performic acid. MOAH losses also vary depending on their composition, which is unpredictable. Furthermore, 2-methylnaphthalene (2MN) and 1,3,5-tri‑tert-butylbenzene (TBB), which are the common quantification standards, are lost at different rates. As a consequence, the final MOAH quantity will vary both depending on the standard used, and on its initial composition. This work presents a new purification approach based on liquid chromatography fractionation on silica using the same column and eluents as for the usual MOSH/MOAH fractionation. This approach efficiently removes squalene, carotenes, and derivatives, without inducing inconsistent losses between the internal standards and MOAH as epoxidation does. On average, MOAH recovery using this new method was 94% (± 8%) in coconut, palm, sunflower, and olive oil, using different MOAH sources and concentrations. Additionally, perspectives are presented regarding the separate analysis and quantification of mono-/diaromatic MOAH and other polyaromatic MOAH. This is of particular interest as these two sub-fractions are associated with different toxicological properties.
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