@misc{10481/99162,
year = {2021},
month = {1},
url = {https://hdl.handle.net/10481/99162},
abstract = {Several studies have shown that the determination of pH in sweat, which is one of the most accessible body
fluids, can be an indicator of health and wellness, and even be used for potential disease diagnosis. On that basis,
we present herein a wearable wristband for continuous and wireless monitoring of sweat pH with potential
applications in the field of personal health assessment. The developed wristband consists of two main parts: a
microfluidic cloth analytical device (μCAD) to collect continuously the sweat from skin with a color-based pH
sensing area; and a readout and processing module with a digital color sensor to obtain the pH of sweat from the
color changes in the μCAD. In addition, the readout module includes a low-power Bluetooth interface to transmit
the measurements in real-time to a custom-designed smartphone application. To allow continuous operation, an
absorbent pad was included in the design to retire and store thsweat from the sensing area through a passive
pump path. It was found that the Hue parameter (H) in the HSV color space can be related to the sweat pH and
fitted to a Boltzmann equation (R2 = 0.997). The range of use of the wristband device goes from 6 to 8, which
includes the pH range of sweat, with a precision at different pH values from 3.6 to 6.0 %. Considering the typical
human sweat rate, the absorbent pad allows continuous operation up to more than 1000 min.},
keywords = {pH sensor},
keywords = {Sweat analysis},
keywords = {Microfluidic cloth analytical device (μCAD)},
keywords = {Wearable system},
keywords = {Wireless monitoring},
keywords = {Smartphone},
title = {Wireless wearable wristband for continuous sweat pH monitoring},
doi = {10.1016/j.snb.2020.128948},
author = {Martínez Olmos, Antonio and Carvajal Rodríguez, Miguel Ángel and Ortega Muñoz, Mariano and Orbe Payá, Ignacio De and Hernández Mateo, Fernando and Santoyo González, Francisco and Capitán Vallvey, Luis Fermín and Palma López, Alberto José and Erenas Rodríguez, Miguel María and Escobedo Araque, Pablo and Ramos Lorente, Celia Esperanza},
}