Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
Talanta. 2019 Apr 1;195:771-777. doi: 10.1016/j.talanta.2018.12.008. Epub 2018 Dec 6.
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 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.
提出了一种基于铂和氯离子相互作用的新的、选择性的伏安法测定氯离子的方法。丝网印刷铂电极（SPPtE）作为传感平台，促进了氯吸附物种在电极表面的形成，成为在多种基质中测定阴离子的有效手段。通过对 SPPtE 进行预处理，并仔细控制阴极剥离伏安参数，得到了一个定义明确的电化学信号。这个阴极峰是由于先前在初始阳极沉积步骤中从氯离子中氧化的氯的吸附。它提供了一种简单、低成本、快速、重现性好（RSD <6%）和精确的选择性氯离子测定方法，检测限为 0.76mM，检测范围宽达 150mM，灵敏度为-24.147µA•mM。正确地对环境、制药和食品样品的单滴进行了氯离子测定。此外，该传感器成功地适应了作为一种柔性丝网印刷铂电极传感器，使用 Gore-Tex 作为打印支撑。
