Pre-Treated Cadmium Oxide Modified Carbon Paste Electrode Sensor for Catechol and Hydroquinone in the Presence of Resorcinol

Document Type : Original Article


Dept of PG studies and research in Industrial Chemistry, Kuvempu University, Jnanasahyadri Shankaraghatta (577451) Shivamogga (D) Karnataka (S), India


In this study, by utilizing the co-precipitation method we prepared a cadmium oxide nanoparticle and analyzed by XRD, SEM, and EDS techniques. By utilizing prepared nanoparticles carbon paste electrode was modified and pretreated with 0.1M NaOH and sensing environmental pollutants. The CdO/PMCPE brings enhanced sensitivity in an electrochemical investigation of Hydroquinone (HQ) and Catechol (CC) in the existence of Resorcinol (RS) by using cyclic voltammetry (CV) and differential pulse Voltammetric techniques (DPV); The experimental parameter such as scan rate and concentration study was carried out for the determination of CC and HQ, the CdO/PMCPE is utilized for individual and concurrent determination of CC, HQ, and RS, then the detection limit for CC, HQ, and RS found to be 0.506 µM, 0.442 µM and 0.651 µM respectively. The effect of conflict was analyzed by using the Differential Pulse Voltammetry. The electrode showed excellent stability and reproducibility, the prepared sensor can be used for the detection of CC, HQ, and RS in real sample analysis.


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