Abstract
The uncompensated cell resistance of six carbon paste compositions used in carbon paste electrodes was measured before and after treatment with a 0.10% (w/v) aqueous surfactant solution. The surfactant treatment considerably lowered the paste uncompensated resistance by removing (or decreasing) the oily, insulating layer produced during the process of smoothing the electrode surface. Electrochemical evaluation of the untreated and treated surfaces was accomplished, by cyclic voltametry, square wave voltametry, and chronocoulometry. The improved response (increase is current) is, with some species, partially due to adsorption, but a significant increase in current was observed with species exhibiting no adsorption behavior (e.g., the reduced form of nicotinamide adenine dinucleotide, NADH). The improved response greatly enhances sensitivity in continuous-flow detection and the partial adsorption is not detrimental to response and quantitation under flow conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
