Electrochemical Measurements in Flow Systems on Silver Amalgam Tubular Detector Combined with Auxiliary Electrode
2018
Abstrakt
A new type of tubular detector (TD+AuxE) was proposed, fabricated, tested and compared with a typical silver amalgam tubular detector developed earlier. Non-stop-flow differential pulse voltammetric anodic stripping method (AS-DPV) and amperometric method in a glucose oxidase biosensor arrangement were tested.
Both detectors were applied for AS-DPV measurements in flow systems for the first time. The proposed combination of tubular detector with auxiliary electrode provides a much greater current response than the classic arrangement with three individual electrodes.
All relevant parameters (potentials of accumulation or detection, flow rate, analyte concentrations, shielding sleeve length, etc.) were optimized for the developed TD+AuxE.