Correlation between Electrochemical Impedance and Spectroscopic Measurements in Adsorbing Paraquat on Silver: Application in Underground Water Samples. Issue 5 (11th December 2015)

• Record Type: Journal Article
• Authors: Lahrich, S.; Hammani, H.; Boumya, W.; Loudiki, A.; Farahi, A.; Achak, M.; Bakasse, M.; El Mhammedi, M. A.
• Is Part Of: Electroanalysis. Volume 28:Issue 5(2016)
• Page Start: 1012
• Page End: 1022
• Publication Date: 2015-12-11
• Subjects: Interfaces -- metals -- organic compounds -- adsorption; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201501047
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: The electrochemical impedance spectroscopy (EIS) has been used to study the interaction between paraquat and carbon modified by silver (AgCPE) and silver particles‐impregnated natural phosphate (Ag/NPhCPE). This study was developed using spectrophotometry (UVVis) and infrared spectroscopy. The resulting interaction was controlled by adsorption at lower concentration (≤1.0×10 −5 mol L −1 ) and by diffusion in the opposite case. Both electrodes are used to determining paraquat with a low detection limit (<1.0×10 −12 mol L −1 ). The precision expressed as relative standard deviation RSD for the concentration level 1.0×10 −5 mol L −1 of paraquat, (n=8) were 0.93 % and 1.1 % for Ag/NPhCPE and AgCPE respectively. Abstract :