The recent trend of using sustainable disinfectants in water treatment sector boosted the employment of chlorine dioxide (ClO₂) as green disinfectant. Indeed, this disinfectant is characterised by several attractive features such as the working capability in a wide range of pH and the absence of harmful by‐products. These characteristics confer to chlorine dioxide a prominent position between the disinfectants, thus analytical tools for on‐site detection are needed to customize the water treatment. Herein, we described the development of an innovative and cost‐effective carbon black modified screen‐printed electrode for amperometric quantification of chlorine dioxide in standard solution and in swimming pool water. The carbon black as working electrode nanomodifier allowed for the detection of chlorine dioxide at low applied potential, with linear range of 0.05–20 ppm, and a detection limit of 0.01 ppm. The matrix effect evaluation as well as the recovery study demonstrated the capability of this sensor for a cost‐effective detection of chlorine dioxide in swimming pool water, paving the way for the use of miniaturised electrochemical sensors in water treatment field.

中文翻译：

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一种用于游泳池水中二氧化氯检测的小型炭黑电化学传感器

在水处理行业中使用可持续消毒剂的最新趋势促进了二氧化氯（ClO ₂）作为绿色消毒剂。的确，这种消毒剂的特点是具有多种吸引人的特征，例如在广泛的pH范围内具有一定的工作能力，并且没有有害的副产物。这些特性使二氧化氯在消毒剂之间占据重要位置，因此需要现场检测分析工具来定制水处理。在此，我们描述了一种创新且具有成本效益的炭黑改性丝网印刷电极的开发，该电极可用于安培定量标准溶液和游泳池水中的二氧化氯。炭黑作为工作电极纳米改性剂，允许在低施加电势下检测二氧化氯，线性范围为0.05–20 ppm，检测极限为0.01 ppm。