A disposable microsensor for continuous monitoring of free chlorine in water

Abstract

In this work, we designed, fabricafed and tested a low cost, disposable, flow-fhrough sensor fo determine the amounf of free chlorine in wafer. The whole sensor cell combining electrodes and a fluidic channel is micromachined on a chemically-inert fransparenf cyclic olefin copolymer substrate. The advantages are (a) disposability from low cost (6) wide operafion range from three-elecfrode design (c) easy electrical andfluidic inferconnecfionfrom a chip format, compared fo previous. works The sensor showed a good response and linearity in the chlorine concenfrafion ;ranging from 1.5 fo 8 ppm, which applies fo common chlorinaiion process

Recent advances in wide bandgap semiconductor biological and gas sensors

“…Excess chlorine also reacts with organics and forms disinfection by-products such as carcinogenic chloroform, which is harmful to human health. Thus, to ensure the safety of public health, it is very important to accurately and effectively monitor chlorine residues, typically in the form of chloride ion concentration, during the treatment and transport of drinking water [222][223][224][225][226][227][228][229][230]. In addition, the chloride ion is an essential mineral for humans, and is maintained to a total body chloride balance in body fluids such as serum, blood, urine, exhaled breath condensate, etc., by the kidneys.…”

Applications of AlGaN/GaN high electron mobility transistor-based sensors in water quality monitoring

“…If the content of these anions is too high, it will cause certain harm to the water environment and result in many problems that affect health. Therefore, it is important to effectively monitor the concentration these anions to ensure public health [79,80]. There are many traditional methods for detecting these anions, such as colorimetry, spectrophotometry, activation analysis, fluorometry, and ion chromatography [81][82][83][84][85].…”

Chloride Ion Detection by InN Gated AlGaN/GaN High Electron Mobility Transistors

“…Therefore, it is important to effectively monitor chlorine residuals, typically in the form of chloride ion concentration, to ensure public health [1,2] . One of its main uses includes sanitizing drinking water supplies and waste water.…”