Analytical Sciences

An Electrochemical Cell Coupled with Disposable Screen-Printed Electrodes for Use in Flow Injection Analysis

Cheng-Teng HSU,* Hsieh-Hsun CHUNG,* Huieh-Jing LYUU,** Dong-Mung TSAI,* Annamalai Senthil KUMAR,* and Jyh-Myng ZEN*

*Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
**Zensor Research & Development, Dali City, Taichung 421, Taiwan

An electrochemical cell coupled with disposable screen-printed electrodes (SPEs) that is specifically designed for use in flow injection analysis (FIA) is described in this study. The cell is made of foldable polyoxymethylene (acetal) thick platelets with the bottom portion consisting of a cavity track to drag the SPEs in position and the top portion having pre-drilled T-like holes to arrange the Ag/AgCl reference electrode and stainless steel inlet & outlet. An “O ring” is suitably fixed on the top of the working electrode to form a thin-layer space where the electrochemical reaction can take place. Hydrodynamic characterization was validated by using a benchmark hexacyanoferrate redox couple. The results of practical analysis of glucose in human plasma clearly demonstrate the characteristics and applicability of the proposed wall-jet electrochemical cell in FIA.

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