Online chemiluminescence determination of the hydroxyl radical using coumarin as a probe.
Anal Methods
; 15(39): 5233-5238, 2023 Oct 12.
Article
em En
| MEDLINE
| ID: mdl-37782128
ABSTRACT
The hydroxyl radical (ËOH) is one of the strongest oxidizing species, which can react with a variety of organic and inorganic chemicals. Although ËOH is widely used for degradation of environmental pollutants, detection of ËOH remains a major challenge due to its high reactivity and short lifetime, especially online detection. In this study, a novel method for online detection of ËOH by flow oxidization chemiluminescence (F-OCL) using coumarin as a probe was established. The concentrations of ËOH determined by this new method were consistent with those determined by HPLC analysis. Because the new method has a short response speed, it was successfully used to quantify the dynamic change of ËOH in the TiO2 photocatalytic process and Fenton reaction in real time. Furthermore, a combination of two chemiluminescence systems was developed to track the dynamics of ËOH and hydrogen peroxide (H2O2) in homogeneous or heterogeneous Fenton reactions occurring in soil slurry. The proposed method and strategy have good application potential in online ROS monitoring of both natural and engineered systems.
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MEDLINE
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En
Ano de publicação:
2023
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Article