Wearable Electronic Tongue for Non-Invasive Assessment of Human Sweat

Sweat is a promising biofluid in allowing for non-invasive sampling. Here, we investigate the use of a voltammetric electronic tongue, combining different metal electrodes, for the purpose of non-invasive sample assessment, specifically focusing on sweat. A wearable electronic tongue is presented by incorporating metal electrodes on a flexible circuit board and used to non-invasively monitor sweat on the body. The data obtained from the measurements were treated by multivariate data processing. Using principal component analysis to analyze the data collected by the wearable electronic tongue enabled differentiation of sweat samples of different chemical composition, and when combined with H-1-NMR sample differentiation could be attributed to changing analyte concentrations.

Automated summary

The study explores the use of a voltammetric electronic tongue for non-invasive assessment of sweat samples, successfully differentiating sweat samples with varying chemical compositions. The wearable electronic tongue, incorporating metal electrodes on a flexible circuit board, allows for monitoring changes in sweat analyte concentrations.