Measurement of free chlorine levels in water using potentiometric responses of biofilms and applications for monitoring and managing the quality of potable water

Colorimetric and fluorometric dual-mode determination of hypochlorite based on redox-mediated quenching

“…13 Therefore, it is imperative to construct an analytical method to estimate ClO − in complicated biological and environmental systems selectively and sensitively. To date, many analytical techniques were used to quantify ClO − such as potentiometry, 14 ion-chromatography, 15 colorimetry, 16,17 chemiluminescence, 18 and fluorometry. 19 Despite the advantages of the colorimetric and fluorometric-based strategies for the detection of analytes, but they depend on a single-mode (rely solely on one quantitative technique), which influenced by environmental factors and non-standard assay procedures, affecting the reliability of the quantitation especially in complex matrices.…”

Diamino group-functionalized Zr-based metal–organic framework for fluorescence sensing of free chlorine in the aqueous phase and Knoevenagel condensation

“…11 So far, a variety of analytical methods such as electrochemical, liquid chromatographic, colorimetric, chemiluminescence, iodometric and fluorescence spectroscopic methods have been used for the monitoring of ClO − . [13][14][15][16][17] A redox based reaction of ClO − with N,N′-diethyl-p-phenylenediamine (DPD) reagent is one of the commonly used techniques for the detection of ClO − . 18 Although this DPD-based colorimetric method gives high sensitivity and precise results, its commercial use is not easy and economic enough due to the requirement of expensive optical instruments and the inconvenience of solution reactions.…”