Simple, Specific, and Ultra‐Sensitive Arsenic Detection in Real Drinking Water Samples Using an Impedimetric Green Sensor with Dimercaprol‐Doped Solid Electrolyte

Abstract Arsenic monitoring is of paramount importance due to its toxicity, which poses potential public health hazards. While numerous sensitive methods exist, many are unsuitable for on‐site, rapid, real‐time measurements, and their sensor preparation is often time‐consuming and intricate. Addressing this gap necessitates the development of an easy‐to‐use, rapid, and reasonably affordable arsenic detection device featuring an eco‐friendly sensor. For on‐site arsenic monitoring, the optimal solution involves creating a sensitive impedimetric electrochemical sensor that is real‐time, fast, low‐cost, simple to design and use, and portable. This study introduces an electrochemical impedimetric sensor with a patent‐pending, solid electrolyte based on gelatin enriched with dimercaprol. The results demonstrate the detection of phenylarsine oxide in real drinking water samples, achieving a detection limit of 0.02 ng/mL within the linear range of 0.05 ng/mL to 100 ng/mL in just 40 minutes, utilizing a simple method and easily accessible, inexpensive, biodegradable chemicals. The methodology yields a sensitive sensor with biodegradable potential, exerting a negligible impact on the environment and human health.