title: Comparison of different modifications on QuEChERS sample preparation method for PAHs determination in black, green, red and white tea.
abstract: The aim of this work was the evaluation of QuEChERS extraction method for polycyclic aromatic hydrocarbon (PAH) determination in various types of tea. In the experiment, different kinds of extraction solvents, sorbents and a final method of sample preparation were compared. The final extracts were analysed by gas chromatography-selected ion monitoring-mass spectrometry. The results suggest that acetonitrile extraction, clean up with SAX and final liquid-liquid extraction was the best combination giving the most purified extracts and acceptable compound recoveries for different types of teas. In the study of real samples, compounds belonging to light PAHs were mostly detected, and heavy polycyclic aromatic hydrocarbons, including benzo[a]pyrene, were not identified in any of samples.
authors.affiliation: Malopolska Centre of Food Monitoring, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149, Krakow, Poland, asadowska-rociek@ar.krakow.pl.
authors.forename: Anna
authors.initials: A
authors.lastname: Sadowska-Rociek
authors.forename: Magdalena
authors.initials: M
authors.lastname: Surma
authors.forename: Ewa
authors.initials: E
authors.lastname: Cieślik
mesh_terms: D028241:Camellia sinensis / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods*; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D059625:Liquid-Liquid Extraction; D013058:Mass Spectrometry; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D013662:Tea / Q000737:chemistry*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D013662:Tea
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