Optimization of the determination method for hypochlorite in natural water

Zhu, Ximiao; Zhang, Junhao; Qin, Wen; Jiang, Shaojun

doi:10.1016/j.molstruc.2022.134417

Cited by 1 publication

(1 citation statement)

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“…Both chemiluminescence and chromatography are susceptible to interference from the external environment, and the instruments are unstable, so they cannot accurately detect ClO – . In short, these methods have shortcomings, for instance, time-consuming, complex detection methods, harsh conditions, and the inability to detect ClO – in biological systems, which limits the real-time and efficient detection of ClO – . , Compared with the traditional methods of detection, fluorescent probe technology has garnered much notice due to its remarkable features, including high sensitivity, high stability, selectivity, fast response, and simple operation. − For instance, Zhu et al designed a fluorescence sensing platform for detecting glutathione (GSH) . Han et al reported a fluorescence analysis method for sensitive detection of H 2 O 2 , glucose, and cholesterol .…”

Section: Introductionmentioning

confidence: 99%

Carbon Quantum Dots for Rapid and Ratiometric Fluorescence Determination of Hypochlorite

Shao,

Guo,

Zhong

et al. 2024

ACS Appl. Nano Mater.

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Herein, we present a method for rapid ratiometric fluorescence detection of hypochlorite (ClO − ) by carbon quantum dots (CDs). Glutathione (GSH) was utilized as the starting material for the synthesis of CDs through a hydrothermal process. A maximum fluorescence intensity at an emission wavelength of 435 nm was observed under an excitation wavelength of 335 nm. The inner filter effect (IFE) of curcumin (CCM) on CDs could be utilized to reduce the fluorescence intensity of CDs at 435 nm, while an emission peak emerged at 540 nm. ClO − could rapidly oxidize CCM due to its oxidizing properties, which weakened the IFE, leading to a decrease in the fluorescence intensity of CCM at 540 nm, while the fluorescence intensity of CDs at 435 nm is restored. In addition, CDs exhibited excellent selectivity and sensitivity in the fluorescence detection of ClO − , and a substantial sensitivity in the detection of ClO − was established within a concentration range of 1−1500 μM with a limit of detection of 36.54 nM. The spiked recovery tests of tap water, swimming pool water, and milk samples showed the feasibility of using CDs for the ratiometric fluorescence detection of ClO − in real samples.

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