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Open AccessArticle

Screen-Printed Electrodes for the Voltammetric Sensing of Benzotriazoles in Water

1
Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
2
Institut de Recerca de l’Aigua (IdRA), University of Barcelona, 08028 Barcelona, Spain
3
Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research—Severo Ochoa Excellence Center (IDAEA), Spanish Council of Scientific Research (CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(7), 1839; https://doi.org/10.3390/s20071839
Received: 6 March 2020 / Revised: 20 March 2020 / Accepted: 24 March 2020 / Published: 26 March 2020
(This article belongs to the Section Chemical Sensors)
Benzotriazoles (BZTs) are high production volume industrial chemicals that are used in various applications such as corrosion inhibitors, antifreeze agents, and UV radiation stabilizers. Given their potential ecotoxicological implications for different ecosystems and in human health, as well as their poor biodegradability, they are of increasing concern. In this study, a new voltammetric method using commercial screen-printed electrodes (SPEs) has been developed for the sensing of BZTs in water samples to help in their environmental monitoring. To this end, different types of SPEs based on carbon nanoallotropes and copper were tested under several experimental conditions to determine the two BZTs most frequently detected in the environment: 1H-benzotriazole (BZT) and 5-methyl-1H-benzotriazole (Me-BZT, tolyltriazole) as model compounds for BZTs. Carbon nanofibers electrodes exhibited the best performance, allowing detection limits as low as 0.4 mg L−1 for both BZTs, with repeatability and reproducibility of ca. 5%. The applicability of the method was tested through the determination of BZT in spiked drinking water samples, suggesting its suitability for the sensing of samples heavily polluted with BZTs. View Full-Text
Keywords: voltammetric sensors; screen-printed electrodes; benzotriazole; tolyltriazole voltammetric sensors; screen-printed electrodes; benzotriazole; tolyltriazole
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Muschietti, A.; Serrano, N.; Ariño, C.; Díaz-Cruz, M.S.; Díaz-Cruz, J.M. Screen-Printed Electrodes for the Voltammetric Sensing of Benzotriazoles in Water. Sensors 2020, 20, 1839.

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