Fast determination of peroxymonosulfate by flow injection chemiluminescence using the Tb(III) ligand in micelle medium

Abstract

Based on the chemiluminescence (CL) phenomenon of peroxymonosulfate (PMS) and Tb(III) enhanced by its ligand in a micelle microenvironment, a fast and sensitive flow injection CL method for PMS detection was proposed and applied to the analysis of different samples and PMS decomposition. Under the optimized conditions, a linear range was obtained from 4.0 × 10–6 mol L–1 to 2.0 × 10–4 mol L–1 with a high correlation coefficient (r = 0.9997), detection limit of 5.0 × 10–7 mol L–1 (S/N = 3) and relative standard deviation of 2.4% for 1.0 × 10–5 mol L–1 PMS (n = 9). This was successfully applied to the determination of PMS in Virkon powder, tap water, and swimming pool water samples with satisfactory recoveries from 94.8% to 104.8%. In particular, the analytical frequency could be as fast as five samples per minute because there was no reaction step before analysis and the CL phenomenon was instantaneous. Therefore, this CL method has also been successfully applied to investigate the PMS decomposition profiles in carbon material (carbon nanotubes, carbon nanofibres, activated carbon and graphene oxide) catalysis systems, which followed pseudo‐first‐order kinetics with good correlation coefficients (r > 0.9305). Quenching experiments and electron spin resonance spectra verified that the CL phenomenon was due to the formation of singlet oxygen, and that hydroxyl and sulfate radicals might be important in the generation of singlet oxygen. Tb(III) is the luminescent emitter according to the characteristics emission bands of the fluorescence and CL spectra in different media.

Chemiluminescence‐assisted study on a peracetic acid‐based advanced oxidation process activated with cobalt phosphide

“…To determine the inner mechanism for CL and pollutant degradation, the EPR method was applied to recognize •OH and 1 O 2 radicals intuitively in the CoP/PAA system [44, 45]. Using DMPO as the •OH trapping agent, the DMPO‐•OH adduct (1:2:2:1) was not detected, which further proved that the contribution of •OH was negligible (Figure 5b).…”

“…Identically, degradation efficiency and CL intensity decreased (Figures 4f and S9f). As depicted in Figure S10, when all scavengers maintained the same concentration, NaN 3 strongly inhibited the decomposition of RhB in the CoP/PAA system, whereas p-BQ, To determine the inner mechanism for CL and pollutant degradation, the EPR method was applied to recognize •OH and 1 O 2 radicals intuitively in the CoP/PAA system [44,45]. Using DMPO as the •OH trapping agent, the DMPO-•OH adduct (1:2:2:1) was not detected, which further proved that the contribution of •OH was negligible (Figure 5b).…”

Critical Review of Synthesis, Toxicology and Detection of Acyclovir

“…Flow injection-chemiluminescence (FI-CL) is a powerful and effective analysis technique, combining chemiluminescence (LC) analysis with a flow injection technique [100]. The schematic diagram of FI-CL is shown in Figure 7.…”

Sulfate Radicals-Mediated Chemiluminescence Production with Peroxydisulfate and Hydroquinone as Coreactants: Mechanism and Environmental Applications

“…In addition, peroxymonosulfate (HSO 5 – , PMS) and peroxydisulfate (S 2 O 8 2– , PDS) used to generate SO 4 •– endow greater stability and safety than some other ROS precursors, such as H 2 O 2 . As a result, there is a growing interest in designing and constructing SO 4 •– -induced CL systems with high CL intensity. ,− In the currently reported SO 4 •– -induced CL systems (excluding electrogenerated CL systems), SO 4 •– is typically generated in situ through the cleavage of the peroxide bond in the persulfate molecule induced by transition metals (e.g., Co(II) and Ag(I)). , For instance, benefiting from the rapid formation of SO 4 •– in the Fe(II)-activated PMS process at pH 3.0 and the high reactivity of SO 4 •– toward naproxen as a CL probe, we have recently developed a reliable Fe(II)/PMS-naproxen system for measuring total organic carbon in wastewater based on determining the CL quenching capacity of organics . Despite the development of several SO 4 •– -induced CL systems, each showcases its own unique application scenarios, and there remains an inherent design pattern, namely, the transition metal/persulfate-luminophore mode, which may pose challenges for broad adoption of SO 4 •– -induced CL systems in some specific fields.…”