Year: 2004
Type: conference-paper
Abstract: Nitrate-sensing system that consists of a micromachined sensor substrate, nitrate-permeable membrane, integrated microfluidic channels, and standard fluidic connectors has been designed, fabricated, assembled, and tested.Our microsensor was designed for in-situ monitoring of nitrate concentrations in ground water.A silver electrode was patterned for amperometric nitrate detection.An electrochemically oxidized silver electrode was used as a reference electrode.Microfluidic channels were fabricated as flow paths for the eluent and ground-water sample to the microelectrochemical (MEC) cell.The sensor also incorporates a nitrate-permeable membrane that is used for selective measurement of nitrate.The sensor has a linear response over concentration ranging from 1 M to 1 mM.
Authors: D. Kim, I.B. Goldberg, J.W. Judy
Institution: University of California, Los Angeles
Language: English
Subfield: Bioengineering
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W3120052976