Flexible electrochemical sensor for detecting chlorine ions in sweat

In this work we present a flexible sensor for Cl ion concentration based on electrochemical measurements, suitable for a rapid screening method of cystic fibrosis. The electrodes have been fabricated by depositing an Ag layer subsequently reduced to Ag/AgCl with two different procedures. The developed electrodes show sensitivity around 52mV/decade in [Cl-] concentration, stability times around 30 minutes, minimum detectable concentration around 240nM and good reproducibility between the different samples. The readout implementable also on flexible support is also shown and characterized. The readout is a reusable support while the electrodes should be replaced at each measurement. The resolution of the tool is comparable with the instrumental equipment used as golden standard in laboratory.