Two Fold Amplification of Paste Electrode with Pt/Graphene Nanocomposite and Room Temperature Ionic Liquid to Monitoring of Vitamin B₆ in Environmental and Food Samples

A new highly sensitive and powerful electroanalytical tool fabricated by two fold amplification of paste electrode (PE) with Pt/graphene nanocomposite (Pt/Gr-NC) and room temperature ionic liquid (1-Hexyl-3-methylimidazolium hexafluorophosphate (1H3MTIHFP) in this case) (Pt/Gr-NC/1H3MTIHFP/PE) for detection and determination of vitamin B₆ in environmental and food samples. The modification with a synergistic effect in the designed sensor has caused the vitamin B₆ signal to increase greatly, and the conditions for designing an ultra-sensitive sensor for the measurement with linear range 0.004–250 µM and the detection limit 0.5 nM created. On the other hand, this synergistic effect (1H3MTIHFP and Pt/Gr-NC) due to presence of has caused the vitamin B₆ oxidation signal to improve about 4.9 times and its oxidation potential to decrease by 140 mV, which means creating a sensor with high selectivity and suitable detection limit. Finally, Pt/Gr-NC/1H3MTIHFP/PE was used as a perfect analytical tool in monitoring of real samples such as fruit juices and water. Results was completely confirm ability of Pt/Gr-NC/1H3MTIHFP/PE in sensing vitamin B₆.