Electrochemical Impedance Spectroscopic Investigation in Detecting 2, 4‐dinitrophenylhydrazine Using Catalytic Effect of Copper at Glassy Electrode. Issue 12 (19th July 2016)

• Record Type: Journal Article
• Authors: Boumya, W.; Hammani, H.; Loudiki, A.; Achak, M.; Bakasse, M.; El Mhammedi, M. A.
• Is Part Of: Electroanalysis. Volume 28:Issue 12(2016)
• Page Start: 2965
• Page End: 2971
• Publication Date: 2016-07-19
• Subjects: 2, 4-dinitrophenylhydrazine -- glassy electrode -- electrochemical impedance spectroscopy -- industrial water; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201600157
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: This paper reports on the use of electrochemical impedance spectroscopy (EIS) allied to copper (II) for the determination of 2, 4‐dinitrophenylhydrazine (DNPH) at glassy carbon electrode (GCE). The experiment measurements were carried out in methanol at a potential of 0.3 V versus Ag/AgCl. The Nyquist plots were modeled with a Randle equivalent circuit, by identifying the charge transfer resistance as the relevant concentration dependent parameter. These measurements show that the impedance spectra of DNPH increased by the formation of non‐electroactive compound produced from specific interaction between DNPH and Cu (II), which will block the electron‐transfer process of the redox probe. Therefore, the proposed methodology offers a detection limit of 4.0×10 −8 mol L −1 . The proposed methodology was satisfactorily applied to determine DNPH in industrial water samples. Abstract :