Thin Layer Disposable Flow Cells As (Spectro)Electrochemical Detectors in FIA Systems

Tuesday, 30 May 2017
Grand Ballroom (Hilton New Orleans Riverside)
P. Fanjul Bolado, H. Kanso, M. B. González García, and D. Hernández Santos (DROPSENS)
In this work different flow-cell electrochemical platforms where channel slide is directly mounted over the screen-printed electrodes are proposed. Flow-cells for screen-printed electrodes are usually wall-jet type but due to the transparent cover that defines the channel (height 400μm, and 100μL of volume), a thin layer is formed over the electrochemical cell. The cover’s transparency allows the detection of air bubbles inside the cell. The injection is done through an “in-line luer injection port” where sample volume can be easily controlled by operator through a Hamilton syringe.

Different configurations of the electrodes in the electrochemical platform can be used, rectangular or circle electrodes, only a working electrode or dual sensors as well as different materials such gold, platinum or carbon, etc.

These electrochemical flow cells combining with the adequate holder and fittings allow us to have an user friendly FIA system with a great possibility of applications based on electrochemical or spectroelectrochemical detection, depending on the set-up used to carry out the measurement.

Here in several samples of the use of these thin layer electrochemical flow-cells as transducers of enzymatic sensors or as detectors are presented showing a good performance, simple operability and effectiveness of working in FIA systems.

The work was carried out in the framework of the European project “BIOENERGY”. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 607793”.