Development of a membraneless extraction module for the extraction of volatile compounds: Application in the chromatographic analysis of vicinal diketones in beer

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Joao Grosso Pacheco (Author) Other; Ines Maria Valente (Author) Other; Luis Moreira Goncalves (Author) Other; Paulo Jorge Magalhaes (Author) Other; Jose Antonio Rodrigues (Author) FCUP; Aquiles Araujo Barros (Author) FCUP

Journal

Title: Talanta

Vol. 81 No. 1-2

Pages: 372-376

ISSN: 0039-9140

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 20 Citations

ISI Web of Science

Scopus - 21 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Physical sciences > Chemistry > Applied chemistry ; Physical sciences > Chemistry > Analytical chemistry

Other information

Authenticus ID: P-003-7GK

DOI: 10.1016/j.talanta.2009.12.011

Abstract (EN): A membraneless extraction module (MLEM) for the sample preparation of volatile compounds and its use for the chromatographic analysis of vicinal diketones in beer are reported. The extraction process is based on the same principles of gas diffusion (GD) and pervaporation (PV); however it does not use a membrane. This module has a lower chamber where the sample continuously flows, while volatile compounds evaporate to the headspace. Inside the module there is a suspended small reactor, where a small volume of a suitable acceptor solution is placed. This extraction module was tested in the determination of vicinal diketones (VDKs) in beer (CV = 5%; LOD = 4 mu g L(-1)), showing applicability with real samples. Several parameters of the extraction process, such as temperature, sample flow and extraction time, were studied and optimized. This module proved to be a good tool for the sampling of volatile compounds, since the extraction is made without using a membrane avoiding all the robustness problems related with its use.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5