Fig. 1.

(A) Picture of microchip setup for flow injection analysis with on-chip injection showing the PDMS-based microchip, microelectrode plate housing gold thin-layer microelectrodes, and tubing with steel pin connectors for fluid access. (B) Micrograph taken with 4x objective featuring a thin-layer mercury/gold amalgam microelectrode (produced by electrodeposition of mercury) adjacent to a bare gold microelectrode with a PDMS-based microchannel (110 μm wide × 117 μm deep) reversibly sealed over both.