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Publication 2021: A reusable, reagent-less free chlorine sensor using gold thin film electrode
Section 1: Publication
Alam, A. U., Clyne, D., Lush, W., & Deen, M. J.
A reusable, reagent-less free chlorine sensor using gold thin film electrode
Analyst, 146(8), 2626-2631.
Alam, A. U., Clyne, D., Lush, W., & Deen, M. J. (2021). A reusable, reagent-less free chlorine sensor using gold thin film electrode. Analyst, 146(8), 2626-2631.
Section 2: Abstract
Free chlorine is widely used as a disinfectant in the water industry. Accurate monitoring of the residual free chlorine concentration in water cycles is critical to maintain public health safety. Here, we report on a thin gold film-based reusable and reagent-less free chlorine sensor. A gold thin film of 300 nm thickness was deposited on a polyimide tape, which was placed on a glass substrate and a simple Styrofoam adhesive tape was used to cover the film and expose 0.36 cm2 circular area as the sensing surface. The sensor showed a high sensitivity of 0.327 μA ppm−1, with a linear range of 0 to 6 ppm, and an accuracy of <0.1 ppm with high selectivity in the presence of commonly interfering ions. The sensor response time was 50 s with a negligible hysteresis of 0.06 ppm. The sensor showed very little change in output current in the pH range between 5.2 to 8.4, and temperature range of 20 to 30 °C. Therefore, the sensor operation is reagent-less, does not need frequent calibration, and showed consistent sensing performance with real water samples. The simple fabrication, ease-of-use and reliable sensing performance of the proposed sensor shows feasibility for mass-production and application in remote and resource-limited areas.
Section 3: Download
Section 4: Computed Information
T-2021-11-14-R10p8FH5Z40Kqrq6WS5q4Iw Publication 1.0