A micromachined electrochemical sensor for free chlorine monitoring in drinking water

Abstract

In this work, we designed, fabricated and tested a disposable, flow-through amperometric sensor for free chlorine determination in water. The sensor is based on the principle of an electrochemical cell. The substrate, as well as the top microfluidic layer, is made up of a polymer material. The advantages include; (a) disposability from low cost; (b) stable operation range from three-electrode design; (c) fluidic interconnections that provide on line testing capabilities; and (d) transparent substrate which provides for future integration of on-chip optics. The sensor showed a good response and linearity in the chlorine concentration ranging from 0.3 to 1.6 ppm, which applies to common chlorination process for drinking water purification.

Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges

“…162 Both electrodes were capped by microuidic channels through which the analyte owed. For example, Au working and counter electrodes were deposited by electron-beam evaporation on cyclic olen copolymer, where the Ag/AgCl reference electrode was electrochemically deposited.…”

Magnetic Carbon Nanostructures and Study of Their Transport in Microfluidic Devices for Hyperthermia

“…Microfluidic devices [79][80][81], food industry [82,83], microelectronics [84,85] and in numerous biochemical and biological processes (e.g., analysis of blood samples [86], drug screening [87], cell counting and sorting [88], cell culture studies [89], polymerase chain reaction (PCR) [90], DNA sequencing [91], among others).…”

Utilisation of micro- and nanoscaled materials in microfluidic analytical devices

“…Also, low fabrication cost, in some cases biocompatibility, the possibility of miniaturisation, reduced volume of waste, easy customisation and transportation are other advantages. Thanks to these properties allowing microchannels to be practical handy devices, microfluidic chips may be applied in clinical diagnostics, especially in point-of-care testing [2,9,10], environment monitoring [11][12][13], food, agriculture and biosystems industries [14][15][16] or biochemical kinetic studies [17][18][19]. Although microchannels have numerous advantages and show a real potential for routine laboratory or in situ applications as illustrated in this review, their success within the commercial sphere is still minimal.…”