Development of a selective chloride sensing platform using a screen-printed platinum electrode

TALANTA

卷:195

Article

Cunha-Silva, Hugo¹  Julia Arcos-Martinez, M.¹ 

[1] Univ Burgos, Fac Ciencias, Dept Quim, Plaza Misael Banuelos S-N, Burgos 09001, Spain

关键词: Chloride;    Platinum electrode surface;    Cathodic stripping voltammetry;    Screen-printed electrode;    Flexible sensor;   

DOI  :  10.1016/j.talanta.2018.12.008

来源: Elsevier

【 摘 要 】

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 mu A 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 (R) as support for printing.

【 授权许可】

Free