Details

Autor(en) / Beteiligte

• Bujes-Garrido, J.
• Izquierdo-Bote, D.
• Heras, A.
• Colina, A.
• Arcos-Martínez, M.J.

Titel

Determination of halides using Ag nanoparticles-modified disposable electrodes. A first approach to a wearable sensor for quantification of chloride ions

Ist Teil von

• Analytica chimica acta, 2018-07, Vol.1012, p.42-48

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2018

Quelle

MEDLINE

Beschreibungen/Notizen

• This work reports a simple voltammetric method for the determination of chloride, bromide, and iodide ions using screen-printed carbon electrodes modified with silver nanoparticles electrochemically deposited on the working electrode surface. UV/Vis absorption spectroelectrochemistry was used to study the electrodeposition of silver nanoparticles on the working carbon electrode on PET or Gore-Tex® supports, and their subsequent oxidation in the presence of halide ions. The main figures of merit of the developed sensors, such as reproducibility and detection limit, have been calculated. Reproducibility values of 2.22%, 2.83% and 3.23% were obtained for chloride, bromide and iodide determinations, respectively. Additionally, the lowest detected amount of chloride, bromide and iodide ions were 3.0·10−6 M, 5.0·10−6 M and 5.0·10−6 M, respectively. Taking into account the relevance of the determination of chloride ion concentration in sweat, the voltammetric method for the determination of halides has been successfully transferred to a Gore-Tex® support to build a first approach to a wearable sensor that facilitates the quantification of this ion in sweat samples. The Gore-Tex® sensor provides a good reproducibility (RSD = 1.61%). [Display omitted] •Voltammetric screen-printed electrodes to halide ions determination by modifying the working electrode with AgNP.•Biocompatible Gore-Tex® wearable electrochemical sensor for voltammetric determination of chloride ions.•Spectroelectrochemistry monitors the electrodeposition and redissolution processes.•Successful determination of chloride ions in sweat samples.