Title: Mathematical modelling and in situ determination of pH in complex aqueous solutions during high-pressure carbon dioxide treatment
Authors: Garcia-Gonzalez, L ×
Teichert, H
Geeraerd, Annemie
Elst, K
Van Ginneken, L
Van Impe, Jan
Vogel, R. F
Devlieghere, F #
Issue Date: Nov-2010
Publisher: PRA Press
Series Title: The Journal of Supercritical Fluids vol:55 issue:1 pages:77-85
Abstract: High-pressure carbon dioxide (HPCD) treatment is currently considered as an attractive non-thermal process for preserving food. Since the first level of interaction between HPCD and the bacterial cells is lowering of the pH, knowledge of the pH of a food product in contact with CO2 at high-pressure conditions is essential for a better understanding of the inactivation mechanism of HPCD. Therefore, a mathematical model was developed to predict the pH in complex aqueous food systems in contact with CO2 at high-pressure conditions as function of pressure, temperature and buffer capacity. In addition, a spectrofluorometric method using calcein as fluorescent pH indicator was designed for the in situ measurement of the pH of complex aqueous systems in contact with pressurized CO2 as function of pressure (10.5-18.0 MPa), temperature (25-35 degrees C), initial pH (4.0-8.0), working volume ratio (41.6-70.0%) and broth composition (0.1 M citrate buffer, 0.1 M phosphate buffer and 10% whey protein). To mimic a complex matrix, the bacterial Brain Heart Infusion (BHI) broth was used.
ISSN: 0896-8446
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Bio- & Chemical Systems Technology, Reactor Engineering and Safety Section
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science