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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.19 [2012] >
IJCT Vol.19(2) [March 2012] >
| Title: | Kinetic behaviour of ascorbic acid - fructose browning reaction in alkaline medium |
| Authors: | Kambo, Neelu
Upadhyay, Santosh K |
| Keywords: | Ascorbic Acid
Browning Coloration
Browning Reaction
Fructose
Kinetics |
| Issue Date: | Mar-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Ascorbic
acid and fructose react in an aqueous alkaline solution at temperature below 50°C
in a Maillard-type reaction to from brown coloured end products. The kinetics
of browning of alkaline solution of fructose in presence of ascorbic acid has
been studied by measuring the absorbance of browning development in the
reaction. The development of brown colour due to heating of either reducing
sugar alone or ascorbic acid alone in the presence of alkali is found to be
very slow even at high temperature (~70°C). However, in the presence of
ascorbic acid the development of brown colour due to heating of alkaline
fructose is sufficiently fast even at low temperature ~50°C. The rate of
development of colour (browning reaction) has been found to be first order
dependence with respect to [alkali] and [fructose] and fractional order
dependence with respect to [ascorbic acid] at low concentrations of ascorbic
acid. A mechanism consistent with the observed kinetic data has also been
proposed. |
| Page(s): | 128-133 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.19(2) [March 2012]
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