Multichannel electrochemical detection with microelectrode array in flowing streams

A multichannel electrochemical detection system for flow injection analysis (FIA) and high-performance liquid chromatography (HPLC) has been fabricated using a 16-channel microelectrode array. The 16-channel detection was performed by collecting current responses at 16 microband electrodes held at potentials differed stepwise by means of a multipotential to show three-dimensional results, i.e., time, current, and potential. The detection limit for the ferrocene derivative is 10 -8 M, and the response shows good linearity over the concentration range 10 -3 -10 -8 M at 16-channel detection.

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