Determination of acetaldehyde in liquid, solid and semi-solid food after pervaporation-derivatization |
| |
| Authors: | I Papaefstathiou U Bilitewski and M D Luque de Castro |
| |
| Institution: | (1) Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, E-14004 Córdoba, Spain, ES;(2) GBF, Gesellschaft für Biotechnologische Forschung mbH, Department of Enzymology, Project Group: Biosensors, Braunschweig, Germany, DE |
| |
| Abstract: | A spectrophotometric method for the determination of acetaldehyde in liquid, semi-solid and solid food samples, employing
the coupling of a continuous flow configuration to a pervaporation unit, has been proposed. It is based on the reaction of
the analyte with fuchsin in acidic medium and subsequent formation of a coloured product (alkylsulphonic acid chromophore)
with sodium sulphite, which was monitored spectrophotometrically. Variable sensitivity was obtained by altering the pervaporation
temperature and the thickness of the membrane. The detection limits went down to 4.2 μg/mL and the precision was between 1.2
and 3.6%.
Received: 5 August 1996/Revised: 16 October 1996/Accepted: 18 October 1996 |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
