3.6. Selectivity of the biosensor
In order to confirm the selectivity of the biosensor, possible interfering species such as ascorbic acid, ethanol, glucose, galactose and sucrose were checked by adding equal quantities of the interferent and fructose. The results are shown in Table 2. No significant influence was observed for all interferences with the only exception of ascorbic acid, which showed an interference of about 8%. However, despite the slight interference of ascorbic acid, these results indicate that the biosensor can be used in fructose determination in real samples as these species do not interfere during detection of fructose.