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Type: Artigo de Periódico
Title: p-Cresol in cheese: is it a flavouring compound or chemical contaminant?
Authors: Susane Namie Oshiro
Marta Batista Ramalho
Paloma Cristina Mota Durães
Raissa Queiroz Andrade
Karolina Soares da Silva
Flaviano Oliveira Silvério
Gevany Paulino de Pinho
Abstract: p-Cresol has been identified as a flavouring compound in cheeses; however, scientific studies have already identified p-cresol as a potential chemical contaminant in environmental matrices. Thus, the objective of this study was to evaluate four traditional methods for extracting p-cresol from cheese samples in order to validate the best method, and finally to apply it to five cheese samples with different origins, processing and ripeness times. The analyses were performed by gas chromatography-mass spectrometry after derivatisation of p-cresol with anhydride acetic and pyridine. Better results were achieved by the QuEChERS method, which showed recovery higher than 80%, relative standard deviation lower than 16%, limit of quantification of 5 μg kg−1 and linearity between 5 and 400 μg kg−1 with R2 0.99. p-Cresol was quantified in almost all of the samples analysed at different concentration levels, which were in an increasing order at μg kg−1: Cheddar (< LOQ), Parmesan (8 ± 0.7), Gorgonzola (103 ± 14), smoked Provolone (365 ± 28) and barbecue cheese (1001 ± 187). Although no maximum residue limit has been established for p-cresol in food, the results suggest that cheeses exposed to charcoal combustion notably increase the p-cresol levels and may represent a hazard to human health, especially in risk groups such as patients with chronic kidney disease who have serious problems with p-cresol.
Subject: Cresol
Extração (Química)
Segurança alimentar
language: eng Brasil
Publisher: Universidade Federal de Minas Gerais
Publisher Initials: UFMG
metadata.dc.publisher.department: ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
Rights: Acesso Restrito
Issue Date: 28-May-2020
metadata.dc.relation.ispartof: Food Additives and Contaminants: Part A
Appears in Collections:Artigo de Periódico

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