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Development and validation of an UHPLC-qTOF-MS method for the quantification of cyclic polyesters oligomers in pasta by applying a modified QuEChERS clean-up

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  • Emmanouil D. Tsochatzis
  • ,
  • Joao Alberto Lopes, European Commission Joint Research Centre Institute
  • ,
  • Helen Gika, Aristotle University of Thessaloniki, Center for Interdisciplinary Research and Innovation (CIRI-AUTH)
  • ,
  • Trine Kastrup Dalsgaard
  • Georgios Theodoridis, Aristotle University of Thessaloniki, Center for Interdisciplinary Research and Innovation (CIRI-AUTH)

An Ultra High-Performance Liquid chromatography method quadruple time-of-flight mass spectrometry has been developed for the analysis of 11 cyclic polyesters oligomers, following a modified QuEChERS clean-up with alumina/primary secondary amine, in pasta. Target analytes were polyethylene terephthalate (PET) 1st series cyclic dimer to heptamer, polybutylene terephthalate (PBT) dimer to pentamer and a polyurethane oligomer. Standard addition method was applied for the calibration, and the limits of quantification ranged from 3.2 to 17.2 ng g−1. Recoveries ranged from 86.4 to 109.8%, RSDs were lower than 12% for all analytes, and matrix effect never exceeded ± 2.5%. The method was successfully applied to real commercial pasta samples, where the PET 1st series cyclic trimer was the most abundant oligomer, being found in all tested samples. The 1st series PET cyclic dimer and tetramer, as well as 1,4,7-trioxacyclotridecane-8,13-dione, were found in considerable amounts. Traces of the 2nd and 3rd series PET cyclic dimers were also found.

Original languageEnglish
Article number129040
JournalFood Chemistry
Number of pages8
Publication statusPublished - Jun 2021

    Research areas

  • Analysis in food samples (pasta), Cyclic polyester oligomers, Food contact materials (FCM), Quadropole time of flight Mass Spectrometry (qTOF-MS), QueChERS clean-up method, Ultra High Performance Liquid chromatography (UHPLC)

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