Kinetics of green asparagus ascorbic acid heated in a high-temperature thermoresistometer |
| |
| Authors: | M. José Esteve A. Frígola L. Martorell Carmen Rodrigo |
| |
| Affiliation: | (1) Departamento Medicina Preventiva y Salud Pública, Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universitat de València, C/ Vicente Andrés Estellés s/n, E-46100 Burjassot, Valencia, Spain, ES |
| |
| Abstract: | Thermal degradation of green asparagus ascorbic acid in high-temperature short-time conditions was studied by heating in a five-channel computer-controlled thermoresistometer. Ascorbic acid was heated to between 110 °C and 140 °C and the degradation kinetics were analyzed assuming that two different inactivation mechanisms were occurring, one aerobic and the other anaerobic. The two reactions followed first-order kinetics, with E a=12.3(2.0) kcal/mol and k 125 °C=47.0(3.0)×10–3 s–1 for the aerobic oxidation, and E a=6.1(1.4) kcal/mol and k 125 °C=4.1(0.2)×10–3 s–1 for the anaerobic degradation. Received: 30 January 1998 / Revised version: 11 June 1998 |
| |
| Keywords: | Ascorbic acid High-temperature short-time degradation Thermoresistometer Green asparagus Kinetics |
| 本文献已被 SpringerLink 等数据库收录！ |
|
