Water status detection by free-dipping method using chitosan based sensor

Abstract

A film sensor based on chitosan that is capable to evidence the different water status has been successfully fabricated by an electrochemical deposition technique. Main objective of this study is to utilize the chitosan as an advanced sensing material to detect the water's conductivity. The presence of amino group in chitosan molecular structure has enabled the chitosan film sensor to detect the water's conductivity by a novel free-dipping method. The result showed that the output voltage of chitosan film sensor was in range of 190 to 206 mV upon exposed to the river water. For the exposure of drinking water, the output voltage was 120 mV and when exposed totreated water, the output voltage was in the range69 to 72 mV.While the exposure of aquadest, the output voltage of chitosan film sensor had the value from 121 to 134 mV. Therefore, the chitosan film sensor was able to show a different output voltage values for each type of water sample.