Document Type : Original Article


1 Department of Food Hygiene, Ayatollah Amoli Branch, Islamic Azad University, Amol 46311-39631, Mazandaran, Iran

2 Department of Food Science and Technology, Ayatollah Amoli Branch, Islamic Azad University, Amol 46311-39631, Mazandaran, Iran


In this study, MgO/CNTs nanocomposite was synthesized using a simple approach according to the hydrogen bonding between the oxygen atom in MgO and hydrogen atom in SWCNTs-COOH. The nanocomposite was characterized using the FESEM and EDS methods. The MgO/CNTs nanocomposite was used for amplification of the paste electrode (PE) at the presence of 1-methyl-3-buthyl imizazolonium tetrafluoroborate (MBITF) as the binder. The MgO/CNTs/MBITF/PE was used as an electroanalytical tool for electro-oxidation determination of vitamin B6 in food samples. In comparison to PE, the oxidation signal of vitamin B6 was improved up to 3.2 times at the surface of MgO/CNTs/MBITF/PE. At pH=6 as optimum condition, the MgO/CNTs/MBITF/PE revealed linear dynamic range of 0.1-400 µM for determination of vitamin B6 with the detection limit of 30.0 nM. In the final step, the MgO/CNTs/MBITF/PE showed acceptable recovery data for the determination of vitamin B6 in fruit juices samples, confirming the ability of the sensors in real sample analysis.

Graphical Abstract

Electrochemical determination of Vitamin B6 in fruit juices using a new nanostructure voltammetric sensor


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