title: Determination of volatile organic compounds in recycled polyethylene terephthalate and high-density polyethylene by headspace solid phase microextraction gas chromatography mass spectrometry to evaluate the efficiency of recycling processes.
abstract: A method for the determination of volatile organic compounds (VOCs) in recycled polyethylene terephthalate and high-density polyethylene using headspace sampling by solid-phase microextraction and gas chromatography coupled to mass spectrometry detection is presented. This method was used to evaluate the efficiency of cleaning processes for VOC removal from recycled PET. In addition, the method was also employed to evaluate the level of VOC contamination in multilayer packaging material containing recycled HDPE material. The optimisation of the extraction procedure for volatile compounds was performed and the best extraction conditions were found using a 75 μm carboxen-polydimethylsiloxane (CAR-PDMS) fibre for 20 min at 60 °C. The validation parameters for the established method were linear range, linearity, sensitivity, precision (repeatability), accuracy (recovery) and detection and quantification limits. The results indicated that the method could easily be used in quality control for the production of recycled PET and HDPE.
authors.affiliation: Department of Food Science, Faculty of Food Engineering, State University of Campinas, Campinas, São Paulo, Brazil.
authors.forename: Camila
authors.initials: C
authors.lastname: Dutra
authors.forename: Davinson
authors.initials: D
authors.lastname: Pezo
authors.forename: Maria Teresa de Alvarenga
authors.initials: MT
authors.lastname: Freire
authors.forename: Cristina
authors.initials: C
authors.lastname: Nerín
authors.forename: Felix Guillermo Reyes
authors.initials: FG
authors.lastname: Reyes
mesh_terms: D018857:Food Packaging; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D016014:Linear Models; D020959:Polyethylene / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D059027:Recycling; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052617:Solid Phase Microextraction / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D011093:Polyethylene Terephthalates; D055549:Volatile Organic Compounds; D020959:Polyethylene