Arsenic-responsive bacterial bioreporters have been shown to perform far better than most chemical field test kits
in detecting arsenic at low concentrations2
. Despite promising results with bacterial bioreporters, their application
would profit much from the use of closed single use incubation and detection systems. Here we show a microfluidic
chip containing immobilized E. coli biosensor bacteria that express green fluorescent protein (GFP) when exposed
to arsenite ions. The long-term goal is automation of dilution series and parallel detection of multiple analytes with
integrated optics.