Voltammetric Sensor Based on Modified Carbon Paste Electrode for Determination of Vitamin B₆

In this work, the vitamin B₆ detected by using a voltammetric sensor based on the use of MoS₂ nanosheets and ionic liquid-modified carbon paste electrode (MoS₂-IL/CPE). Electrochemical performance in the detection of vitamin B₆ at the MoS₂-IL/CPE was investigated by using cyclic voltammetry (CV), chronoamperometry (CHA), and differential pulse voltammetry (DPV). Compared with the bare CPE, the oxidation peak current of vitamin B₆ at the MoS₂-IL/CPE was significantly increased. A good linear relationship between the oxidation peak current and the vitamin B₆ concentration was found in the range of 5.0–900.0 µM, with a detection limit of 1.5 µM. In addition, MoS₂-IL/CPE was successfully used for determination of vitamin B₆ in the real samples, and was demonstrated to be an effective and sensitive method.