Simultaneous Determination of Catechol and Hydroquinone on Nano-Co/L-Cysteine Modified Glassy Carbon Electrode |
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| Authors: | Baomei Huang Chengwei Yao Enyang Wang Shizhang Du Jing Yang Xiaoquan Lu |
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| Institution: | 1. College of Chemistry & Chemical Engineering, MianYang Normal University, MianYang, 621000 China;2. Facility design and instrumentation institute, China aerodynamics research and development center, MianYang, 621000 China;3. Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070 China |
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| Abstract: | In this study, a novel and highly sensitive electrochemical method for simultaneous determination of catechol (CC) and hydroquinone (HQ) was developed, which worked at GCE modified with Nano cobalt (Nano-Co) by electrodeposition and L-Cysteine by electrochemical polymerization. The Nano-Co/L-Cysteine GCE was investigated by cyclic voltammetry (CV), SEM and EIS. The excellent conditions have been selected including supporting electrolyte, pH, accumulation time and scan rate. The calibration curves of were obtained that the linear regression equation was I=0.0734c+6×10?6 in the range of 5.8 μM to 103 μM (R2=0.9942) for CC and the linear regression equation was I=0.0566c+5×10?6 in the range of 5.8 μM to 100 μM (R2=0.9967) for HQ. The obtained detection limits of CC and HQ both were 6×10?7 M. The modified electrode was successfully applied to the simultaneous determination of CC and HQ in water samples. |
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| Keywords: | Catechol Hydroquinone Nano- cobalt L-Cysteine Electrochemical method |
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