The performance of a nitrogen-containing tetrahedral amorphous carbon electrode in flow injection analysis with amperometric detection

Abstract

The performance of a nitrogen-incorporated tetrahedral amorphous (ta-C:N) carbon thin-film electrode was evaluated using flow injection analysis with amperometric detection.

Assessment of heterogeneous electron‐transfer rate constants for soluble redox analytes at tetrahedral amorphous carbon, boron‐doped diamond, and glassy carbon electrodes

“…The ta‐C:N thin‐film electrode is attractive for electroanalysis because of the lower background current and wider potential window, as compared to GC, the weak adsorption (resistance to fouling) that occurs on the surface, and the microstructural stability particularly at positive detection potentials . As more is learned about the basic electrochemical properties of this material and how to control them through manipulation of the growth conditions, a wide range of electroanalytical applications will emerge.…”

“…We recently reported on some of the basic electrochemical properties of nitrogen‐incorporated tetrahedral amorphous carbon (ta‐C:N) thin‐film electrodes , and on the application of this material in flow injection analysis with amperometric detection . The use of ta‐C electrodes in electroanalyis is a rather new area of research.…”

Isatin Analysis Using Flow Injection Analysis with Amperometric Detection – Comparison of Tetrahedral Amorphous Carbon and Diamond Electrode Performance

“…FIA System and Electrochemical Detection Cell . A home‐built flow injection analysis (FIA) system was used in the measurements . The carrier solution flow was regulated with an Alltech Model 301 HPLC pump (Grace).…”

“…The entire system was electrically grounded and the electrochemical detection cell was housed in a grounded Faraday cage to reduce electrical noise. The home‐made, cross‐flow electrochemical detection cell was constructed with two pieces of Kel‐f . The top piece contained the entrance and exit ports for the carrier solution and a port for the no‐leak Ag/AgCl mini‐reference electrode (ET072‐1, eDAQ).…”

“…Two new carbon electrodes were compared: boron‐doped nanocrystalline diamond and nitrogen‐incorporated tetrahedral amorphous carbon. These two carbon electrodes exhibit some excellent properties and offer good sensitivity, reproducibility and stability for analytes such as amino acids , serotonin and pharmaceuticals . Boron‐doped diamond has been used extensively and researched for two decades now, and is well known for its excellent properties such as a low stable background current, a wide working potential window, weak molecular absorption and resistance to electrode fouling, and good microstructural stability during the imposition of high currents and potentials .…”