title: Determination of Carbonyl Compounds in Cork Agglomerates by GDME-HPLC-UV: Identification of the Extracted Compounds by HPLC-MS/MS.
abstract: A new approach is proposed for the extraction and determination of carbonyl compounds in solid samples, such as wood or cork materials. Cork products are used as building materials due to their singular characteristics; however, little is known about its aldehyde emission potential and content. Sample preparation was done by using a gas-diffusion microextraction (GDME) device for the direct extraction of volatile aldehydes and derivatization with 2,4-dinitrophenylhydrazine. Analytical determination of the extracts was done by HPLC-UV, with detection at 360 nm. The developed methodology proved to be a reliable tool for aldehyde determination in cork agglomerate samples with suitable method features. Mass spectrometry studies were performed for each sample, which enabled the identification, in the extracts, of the derivatization products of a total of 13 aldehydes (formaldehyde, acetaldehyde, furfural, propanal, 5-methylfurfural, butanal, benzaldehyde, pentanal, hexanal, trans-2-heptenal, heptanal, octanal, and trans-2-nonenal) and 4 ketones (3-hydroxy-2-butanone, acetone, cyclohexanone, and acetophenone). This new analytical methodology simultaneously proved to be consistent for the identification and determination of aldehydes in cork agglomerates and a very simple and straightforward procedure.
authors.affiliation: REQUIMTE/LAQV - Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre no. 687, 4169-007 Porto, Portugal.
authors.forename: Pedro Francisco
authors.initials: PF
authors.lastname: Brandão
authors.affiliation: REQUIMTE/LAQV - Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre no. 687, 4169-007 Porto, Portugal.
authors.forename: Rui Miguel
authors.identifier: http://orcid.org/0000-0003-0313-6985
authors.initials: RM
authors.lastname: Ramos
authors.affiliation: REQUIMTE/LAQV - Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre no. 687, 4169-007 Porto, Portugal.
authors.forename: Paulo Joaquim
authors.initials: PJ
authors.lastname: Almeida
authors.affiliation: REQUIMTE/LAQV - Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências, Universidade do Porto , Rua do Campo Alegre no. 687, 4169-007 Porto, Portugal.
authors.forename: José António
authors.initials: JA
authors.lastname: Rodrigues
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D010936:Plant Extracts / Q000737:chemistry*; D029963:Quercus / Q000737:chemistry*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014934:Wood / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D010936:Plant Extracts
keywords: building materials; dnph; mass spectrometry; volatile extraction; volatile organic compounds