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oai:riubu.ubu.es:10259/53472022-04-08T10:31:37Zcom_10259_4376com_10259_5086com_10259_2604col_10259_4377

Development of a selective chloride sensing platform using a screen-printed platinum electrode Cunha Silva, Hugo Arcos Martínez, Julia Chloride Platinum electrode surface Cathodic stripping voltammetry Screen-printed electrode Flexible sensor Química analítica Chemistry, Analytic A new and selective voltammetric method for chloride determination is proposed, based on platinum and chloride interactions. A screen-printed platinum electrode (SPPtE) functions as a sensing platform, which promotes the formation of chloro-adsorbed species on the electrode surface, acting as an effective means of anion-determination in several matrices. The pretreatment of the SPPtE and careful control of the cathodic stripping voltammetric parameters yielded a well-defined electrochemical signal. This cathodic peak was due to the adsorption of chlorine, which had previously been oxidized from chloride anions in the initial anodic deposition step. It offers a simple, low-cost, fast, reproducible (RSD < 6%) and precise method for selective chloride determination, with limit of detection of 0.76 mM, and a sensitivity of − 24.147 µA mM −1 for a broad determination range of up to 150 mM. Chloride determination was correctly performed with single drops of environmental, pharmaceutical and food samples. In addition, the sensor was successfully adapted as a flexible screen-printed platinum electrode sensor using Gore-Tex® as support for printing. Spanish Ministry of Science and Innovation (MICINN), Ministry of Economy and Competitiveness (MINECO) and the European Regional Development Fund (FEDER) (TEC20013-40561-P and MUSSEL RTC-2015-4077-2). Hugo Cunha-Silva would like to acknowledge funding from the Spanish Ministry of Economy (BES-2014-068214). 2020-06-18T08:19:40Z 2020-06-18T08:19:40Z 2019-04 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0039-9140 http://hdl.handle.net/10259/5347 10.1016/j.talanta.2018.12.008 eng Talanta. 2019, V. 195, p. 771-777 https://doi.org/10.1016/j.talanta.2018.12.008 info:eu-repo/grantAgreement/MICINN/TEC20013-40561-P info:eu-repo/grantAgreement/MINECO/MUSSEL RTC-2015-4077-2 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier https://riubu.ubu.es/bitstream/10259/5347/4/Cunha-talanta_2019.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ RIUBU. Repositorio Institucional de la Universidad de Burgos http://hdl.handle.net/10259/5347