Patent ID: 6932940

Claim:
A detection system for a bio-separation device, comprising: a separation channel having an exit and a first width; a detection section having a second width larger than the first width of the separation channel, wherein flow from the separation channel exits from the exit of the separation channel into the detection section, and wherein mixing or diffusion of analytes occurs near the exit of the separation channel; an excitation system introducing excitation radiation axially at a location along the detection section defining a detection zone as analytes pass the detection zone, said location being defined at a distance of 100 to 500 times the second width of the detection section from the exit of the separation channel, thereby allowing analytes sufficient distance to regroup from the mixing or diffusion near the exit of the separation channel, said excitation system including an optic fiber having an end in close proximity to the detection zone; and a detector system detecting radiation emission from the detection zone.