Electrochemical Determination of Hydroquinone By Using Poly Malachite Green Modified Carbon Paste Electrode Prepared From Activated Carbon From Aframomum Cororima Husk and Graphite Powder

Abstract

Hydroquinone (HQ) is the oxidation product of some aromatic compounds. HQ is widely found in cigarette smoke, diesel engine lubricant and the chemical industry. Industrial development has caused a huge increase in the release of potentially toxic compounds into the atmosphere, water bodies and soils. Therefore, a simple, cheap and sensitive determination method of HQ is highly desired. In this work, the electrochemical determination of HQ was reported. The oxidation current response of HQ at the poly malachite green modified carbon paste electrode (PMG-CPE) was investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV) methods. The performance between unmodified carbon paste electrode (UCPE) and PMG-CPE was made toward the determination of HQ. Due to the different interactions of the HQ at the electrode surface, the PMG-CPE electrode signal intensity of the developed method gives much higher than UCPE in phosphate buffer solution (PBS). Under the optimized experimental conditions, the electrode oxidation peak current was a direct relationship with the concentration of HQ in the range of 1 μM to 75 μM and a limit of detection (LOD) of 0.82 μM (3σ/m). The reported PMG-CPE was further applied for the determination of HQ in waste water with acceptable recoveries.