000130861 001__ 130861
000130861 005__ 20240201151018.0
000130861 0247_ $$2doi$$a10.1007/s00216-018-0902-4
000130861 0248_ $$2sideral$$a104580
000130861 037__ $$aART-2018-104580
000130861 041__ $$aeng
000130861 100__ $$0(orcid)0000-0002-9804-8699$$aUbeda, Sara$$uUniversidad de Zaragoza
000130861 245__ $$aDetermination of oligomers in virgin and recycled polyethylene terephthalate (PET) samples by UPLC-MS-QTOF
000130861 260__ $$c2018
000130861 5060_ $$aAccess copy available to the general public$$fUnrestricted
000130861 5203_ $$aAn oligomer is a molecule that consists of a few monomer units. It can be formed during polymer manufacturing and also due to polymer degradation processes or even during use conditions. Since oligomers are not included in chemical databases, their identification is a complex process. In this work, the oligomers present in 20 different PET pellet samples have been determined. Two different sample treatment procedures, solvent extraction and total dissolution, were applied in order to select the most efficient one. The analyses were carried out by UPLC-MS-QTOF. The use of high resolution mass spectrometry allowed the structural elucidation of these compounds and their correct identification. The main oligomers identified were cyclic as well as lineal from the first, second, and third series. All of them were composed of terephthalic acid (TPA), diethylene glycol (DEG), and ethylene glycol (EG). Quantitative values were very different in both procedures. In total dissolution of PET samples, the concentration of oligomers was always, at least, 10 times higher than in solvent extraction; some of the compounds were only detected when total dissolution was used. Results showed that the oligomers with the highest concentration values were dimers and trimers, cyclic, as well as lineal, from the first and second series. The oligomer with the maximum concentration value was TPA2-EG-DEG that was found in all the samples in a concentration range from 2493 to 19, 290 ng/g PET. No differences between virgin and recycled PET were found. Migration experiments were performed in two PET bottles, and results showed the transference of most of these oligomers to a fat food simulant (ethanol 95%).
000130861 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T10$$9info:eu-repo/grantAgreement/ES/MINECO/AGL2015-67362-P$$9info:eu-repo/grantAgreement/ES/MINECO/RYC-2012-11856
000130861 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000130861 590__ $$a3.286$$b2018
000130861 591__ $$aCHEMISTRY, ANALYTICAL$$b18 / 84 = 0.214$$c2018$$dQ1$$eT1
000130861 591__ $$aBIOCHEMICAL RESEARCH METHODS$$b20 / 78 = 0.256$$c2018$$dQ2$$eT1
000130861 592__ $$a0.883$$b2018
000130861 593__ $$aBiochemistry$$c2018$$dQ1
000130861 593__ $$aAnalytical Chemistry$$c2018$$dQ1
000130861 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000130861 700__ $$0(orcid)0000-0002-0759-9170$$aAznar, Margarita$$uUniversidad de Zaragoza
000130861 700__ $$0(orcid)0000-0003-2685-5739$$aNerín, Cristina$$uUniversidad de Zaragoza
000130861 7102_ $$12009$$2750$$aUniversidad de Zaragoza$$bDpto. Química Analítica$$cÁrea Química Analítica
000130861 773__ $$g410, 9 (2018), 2377–2384$$pAnal. Bioanal. Chem.$$tAnalytical and Bioanalytical Chemistry$$x1618-2642
000130861 8564_ $$s921743$$uhttps://zaguan.unizar.es/record/130861/files/texto_completo.pdf$$yPostprint
000130861 8564_ $$s1736767$$uhttps://zaguan.unizar.es/record/130861/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000130861 909CO $$ooai:zaguan.unizar.es:130861$$particulos$$pdriver
000130861 951__ $$a2024-02-01-14:35:09
000130861 980__ $$aARTICLE