DETECTION OF HYDROQUINONE WITH ELECTROCHEMICAL SENSOR USING MXene/Poly Alanine MODIFIED ELECTRODE

Phenolic compounds are extensively used in environmental protection, food safety, and human health, making their detection a critical concern. Hydroquinone, a widely used isomer of dihydroxy benzene, is classified as a priority pollutant by the US Environmental Protection Agency (EPA) and the European Union (EU). In this study, we developed a robust and sensitive method for detecting hydroquinone (HQ). The sensor was created by sequentially depositing Titanium carbide (Ti3C2Tx, MXene) and L-alanine on a glassy carbon electrode (GCE). The sensor demonstrated a linear correlation between current and concentration in the range of 30 × 10−6 mol L−1 to 100 × 10 −6 mol L−1. Additionally, pH and scan rate optimizations were performed to achieve the best affinity conditions between the analytes and the electrode surface.