Hb. Qu et al., SIMULTANEOUS DETERMINATION OF MALTOSE AND GLUCOSE USING A DUAL-ELECTRODE FLOW-INJECTION SYSTEM, Food chemistry, 52(2), 1995, pp. 187-192
A dual-electrode system consisting of a glucose oxidase (GOD) electrod
e and an amyloglucosidase/glucose oxidase (A/G) electrode in an FIA ma
nifold was constructed to determine maltose and glucose simultaneously
in their mixture. Highly active enzyme membranes were acquired. The l
inear range of the system was 0.3-30 mmol/litre of sugars. The Variati
on coefficients were 3.2% for the GOD electrode and 1-6% for the A/G e
lectrode in measuring the mixture of glucose and maltose. The results
made by the dual-electrode system agreed well with those made by Fehli
ng titration. During 20 days' determination, the activities of the enz
yme electrodes showed no decay.