Abstract:
: Nanocrystalline metallosilicate modified glassy
carbon electrodes were fabricated for the simultaneous
determination of vitamins. Among these, nanocrystalline
zirconosilicate exhibited the highest activity with a linear
range from 30 nM–500 mM for riboflavin and 120 nM–
600 mM for rutin and pyridoxine. Sensitivity values of 2.8,
1.49, and 1.13 mA/mM cm2 and lower detection limits of
5 nM, 30 nM, and 30 nM for riboflavin, rutin, and pyridoxine, respectively, were found. The proposed sensor is
stable and reproducible (RSD<3.5%). The analytical
performance of this sensor was demonstrated in the pharmaceutical preparations (multivitamin tablets) with satisfactory recovery (97–103%).
