DC FieldValueLanguage
dc.contributor.authorPinheiro, Isabel-
dc.contributor.authorJesuíno, Bruno-
dc.contributor.authorBarbosa, Jorge-
dc.contributor.authorFerreira, Humberto-
dc.contributor.authorRamos, Fernando-
dc.contributor.authorMatos, José-
dc.contributor.authorSilveira, Maria Irene Noronha da-
dc.date.accessioned2009-06-24T15:55:11Z-
dc.date.available2009-06-24T15:55:11Z-
dc.date.issued2009-02-11-
dc.identifier.citationJournal of Agricultural and Food Chemistry. 57:3 (2009) 910-914en_US
dc.identifier.issn0021-8561-
dc.identifier.urihttp://hdl.handle.net/10316/10327-
dc.description.abstractClenbuterol is a well-known growth promoter, illegally used in farm animals, especially in cattle. Samples collected for the screening of β2-agonist residues in Portuguese Azores Islands must travel through all the nine islands until they reach Azores Central Laboratory. If any suspicious sample is detected, it must be further transported to the National Reference Laboratory in Lisbon for confirmation. As a consequence of these circumstances, samples are submitted to different transport and storage times, as well as different temperature conditions and in some cases successive freezing and thawing cycles. As clenbuterol is the most detected β2-agonist growth promoter in the Portuguese Residue Monitoring Plan, studies were conducted on the stability of this compound in incurred samples (bovine liver and urine) at +4, −20 and −60 °C over time. Samples kept at −20 °C were also analyzed over time after successive freezing and thawing cycles. The analyses of clenbuterol over time were performed by gas chromatography−mass spectrometry (GC−MS) with selected ion monitoring (SIM). Clenbuterol in incurred urine and liver samples was significantly stable up to 20 weeks at −20 and −60 °C and after, at least, six consecutive freezings and thawings. At +4 °C, clenbuterol remained stable, at least until 12 weeks in urine and up to 20 weeks in liver.en_US
dc.description.urihttp://dx.doi.org/10.1021/jf802995e-
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsopenAccesseng
dc.subjectClenbuterolen_US
dc.subjectUrineen_US
dc.subjectLiveren_US
dc.subjectStabilityen_US
dc.subjectGC-MSen_US
dc.titleClenbuterol Storage Stability in the Bovine Urine and Liver Samples Used for European Official Control in the Azores Islands (Portugal)en_US
dc.typearticleen_US
item.grantfulltextopen-
item.fulltextCom Texto completo-
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