2026-06-29T21:08:44Zhttps://riubu.ubu.es/oai/request

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

00925njm 22002777a 4500 dc Cunha Silva, Hugo author Arcos Martínez, Julia author 2019-04 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. 0039-9140 http://hdl.handle.net/10259/5347 10.1016/j.talanta.2018.12.008 Chloride Platinum electrode surface Cathodic stripping voltammetry Screen-printed electrode Flexible sensor Development of a selective chloride sensing platform using a screen-printed platinum electrode