Patent ID: 7438792

Claim:
An electrochemical detector comprising: a first working electrode and a reference electrode located in a detection reservoir, the detection reservoir in fluid communication with an exit end of a separation channel of a sample component separation apparatus, the first working electrode and the reference electrode being located at a distance downstream from the exit end of the separation channel; a first channel located on a first side of the separation channel and in fluid communication with the exit end of the separation channel; a second channel located on a second side of the separation channel and in fluid communication with the exit end of the separation channel; and the first and second channels configured and arranged to intersect with the detection reservoir at the exit end of the separation channel to provide a sheath flow at the juncture of the first and second channels at the exit end of the separation channel such that the sheath flow transports a sample component from the exit end of the separation channel without substantial dilution to the first working electrode.