Data/hora: 10/06/2024 06:35:29

Biblioteca(s): | Embrapa Agroindústria de Alimentos.
Data corrente: | 15/02/2019
Data da última atualização: | 10/10/2019
Autoria: | NOVAES, F. J. M.; SILVA, A. I. da; KULSING, C.; NOLVACHAI, Y.; BIZZO, H. R.; AQUINO NETO, F. R. de; RESENDE, C. M.; MARRIOT, P. J.
Afiliação: | Fábio Junior Moreira Novaes, UFRJ; Ademário Iris da Silva, IFRJ; Chadin Kulsing, Chulalongkorn University; Monash University; Yada Nolvachai, Monash University; HUMBERTO RIBEIRO BIZZO, CTAA; Francisco Radler de Aquino Neto, UFRJ; Claudia Moraes de Rezende, UFRJ; Philip John Marriott, Monash University.
Título: | New approaches to monitor semi-volatile organic compounds released during coffee roasting using flow-through/active sampling and comprehensive two-dimensional gas chromatography.
Ano de publicação: | 2019
Fonte/Imprenta: | Food Research International, v. 119, p. 349-358, 2019.
DOI: | https://doi.org/10.1016/j.foodres.2019.02.009
Idioma: | Inglês
Conteúdo: | A novel dynamic approach is described to profile volatile organic compound (VOC) and semi-VOC (SVOC) emission during coffee roasting aimed at analysing components present in the roasting plume, and to monitor their evolution during the process. Two sorbents ? coconut shell charcoal (CSC) and styrene-divinylbenzene resin (XAD-2) ? were evaluated while collecting substances in four sequential time intervals (0?3, 3?6, 6?9 and 9?12?min). Extracted VOCs (<200?Da) and SVOCs were analysed by gas chromatography (GC), and comprehensive two-dimensional gas chromatography (GC?×?GC) with flame ionisation (FID) and time-of-flight mass spectrometry (TOFMS) detection. Results showed CSC extraction presented poor recovery of VOCs and SVOCs released during roasting. However, XAD-2 was able to collect both groups, including SVOCs of >400?Da. GC?×?GC resolved many co-eluting compounds observed in 1D GC and allowed chemical group type cluster analysis, revealing that many non-polar VOCs are observed within the 0?3?min interval, and that the release of polar and higher molar mass SVOCs were mostly found within the 3?6?min interval. These group-type cluster analyses offer a broad spectrum chemical profile of the released substances. It may also reveal detailed insights into the roast process evolution over time.
Palavras-Chave: | Esteróis; GC x GC; Semi-volatile organic compound; Styrene-divinylbenzene resin; SVOC; XAD-2.
Thesagro: | Ácido Graxo; Café; Cafeína; Composto Orgânico; Cromatografia; Cromatografia Gasosa; Extração; Grão; Lipídio; Produto de Origem Vegetal; Torrefação.
Thesaurus Nal: | Caffeine; Coffee beans; Comprehensive two-dimensional gas chromatography; Cracking; Fatty acids; Lipids; Organic compounds; Solid phase extraction; Sterols; Styrene; Vegetable products.
Categoria do assunto: | W Química e Física
Registro original: | Embrapa Agroindústria de Alimentos (CTAA)
Exemplares: | CTAA - (14438-1) - UPC - AP - DD -  -  -  - DIS