|
|||||
|
|
Correlation between Electrochemical Impedance and Spectroscopic Measurements in Adsorbing Paraquat on Silver: Application in Underground Water Samples |
|
| Authors: | S Lahrich H Hammani W Boumya A Loudiki A Farahi M Achak M Bakasse M A El?Mhammedi |
| Affiliation: | 1. Univ Hassan 1, Laboratoire de Chimie et Modélisation Mathématique, 25?000 Khouribga, Morocco, Tel: +212?68858296;2. fax: +212?23485201;3. Ecole Nationale des Sciences Appliquées, Laboratoire des Sciences de l'Ingénieur Pour l'Energie, Université Chouaib Doukkali, El Jadida, Morocco;4. Univ Chouaib Doukkali, Laboratoire de Chimie Organique Biorganique et Environnement, Faculté de Sciences, Morocco |
| 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. |
| Keywords: | Interfaces metals organic compounds adsorption |
