Size–Dependent Active Effect of Cadmium Telluride Quantum Dots on Luminol–Potassium Periodate Chemiluminescence System for Levodopa Detection

Wang, Jianbo; Cui, Lijuan; Han, Song; Fang, Hao

doi:10.1366/14-07632

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…The fluorescence result in Figure 6b revealed that a maximum emission wavelength was found at 419 nm, which suggested that the possible emission species was the oxidated 3-aminophthalate (AP 2−* ) and the emitter was 3-aminophthalate (AP 2− ) [45,46]. Since the light emission spectrum was independent of the inhibitor, this result also indicated the prohibition process by BPA was dynamic quenching [47].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Molecularly Imprinted Microspheres as Biomimetic Recognition Material for In Situ Adsorption and Selective Chemiluminescence Determination of Bisphenol A

et al. 2018

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Bisphenol A (BPA) is an endocrine disrupter in environments which can induce abnormal differentiation of reproductive organs by interfering with the action of endogenous gonadal steroid hormones. In this work, the bisphenol A (BPA) molecularly-imprinted microspheres (MIMS) were prepared and used as biomimetic recognition material for in situ adsorption and selective chemiluminescence (CL) determination of BPA. Through non-covalent interaction, the BPA-MIMS was successfully prepared by Pickering emulsion polymerization using a BPA template, 4-vinylpyridine (4-VP) monomer, ethylene glycol dimethacrylate (EGDMA) cross-linker, and a SiO2 dispersion agent. The characterization of scanning electron microscopy (SEM) and energy-disperse spectroscopy (EDS) showed that the obtained MIMS possessed a regular spherical shape and narrow diameter distribution (25–30 μm). The binding experiment indicated BPA could be adsorbed in situ on the MIMS-packing cell with an apparent maximum amount Qmax of 677.3 μg g−1. Then BPA could be selectively detected by its sensitive inhibition effect on the CL reaction between luminol and periodate (KIO4), and the inhibition mechanism was discussed to reveal the CL reaction process. The CL intensity was linear to BPA concentrations in two ranges, respectively from 0.5 to 1.5 μg mL−1 with a detection limit of 8.0 ng mL−1 (3σ), and from 1.5 to 15 μg mL−1 with a limit of detection (LOD) of 80 ng mL−1 (3σ). The BPA-MIPMS showed excellent selectivity for BPA adsorption and the proposed CL method has been successfully applied to BPA determination in environmental water samples.

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Section: Resultsmentioning

confidence: 99%

Preparation of Molecularly Imprinted Microspheres as Biomimetic Recognition Material for In Situ Adsorption and Selective Chemiluminescence Determination of Bisphenol A

et al. 2018

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“…Given the biological effects of L-DOPA, its determination by various methods has attracted the interest of numerous research teams. Over time, various techniques for the detection of levodopa have been used, such as high-performance liquid chromatography [ 12 ], spectrophotometry [ 13 ], chemiluminescence [ 14 ] and electrochemical methods [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Levodopa Using Mesoporous Carbon—Modified Screen-Printed Carbon Sensors

Dăscălescu

Apetrei

2021

Sensors

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Levodopa is a precursor of dopamine, having important beneficial effects in the treatment of Parkinson’s disease. In this study, levodopa was accurately detected by means of cyclic voltammetry using carbon-based (C-SPCE), mesoporous carbon (MC-SPCE) and ordered mesoporous carbon (OMC-SPCE)-modified screen-printed sensors. Screen-printed carbon sensors were initially used for the electrochemical detection of levodopa in a 10−3 M solution at pH 7.0. The mesoporous carbon with an organized structure led to better electroanalysis results and to lower detection and quantification limits of the OMC-SPCE sensor as compared to the other two studied sensors. The range of linearity obtained and the low values of the detection (0.290 µM) and quantification (0.966 µM) limit demonstrate the high sensitivity and accuracy of the method for the determination of levodopa in real samples. Therefore, levodopa was detected by means of OMC-SPCE in three dietary supplements produced by different manufacturers and having various concentrations of the active compound, levodopa. The results obtained by cyclic voltammetry were compared with those obtained by using the FTIR method and no significant differences were observed. OMC-SPCE proved to be stable, and the electrochemical responses did not vary by more than 3% in repeated immersions in a solution with the same concentration of levodopa. In addition, the interfering compounds did not significantly influence the peaks related to the presence of levodopa in the solution to be analyzed.

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“…Semiconductor nanocrystals or quantum dots (QDs) with merits of good reactivity, brightness and continuous band gap tunability have attracted increasing attention to produce CL emission or sensitize luminescence caused by other emitters in redox reactions . In this case, some researchers have focused on the investigation of CL mechanisms of QD‐based CL reactions for analytical applications . For example, possible CL mechanisms for luminol‐based systems including the luminol−H 2 O 2 system, the luminol−KMnO 4 system and the luminol−K 3 Fe(CN) 6 system catalysed by different QDs have been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Li and colleagues have reported enhanced CL for the luminol−KIO 4 system using ZnS nanoparticles and the CL mechanism was discussed in detail. Wang and co‐authors have also developed a CL method for levodopa detection using the CdTe QDs‐enhanced CL system and revealed the sensitized effect of differently sized CdTe QDs on the CL intensity of the luminol−KIO 4 system. A review on the mechanism and applications of QDs‐enhanced CL has been published .…”

Section: Introductionmentioning

confidence: 99%

Flow‐injection chemiluminescence of the luminol–potassium periodate system enhanced by TGA–capped CdTe quantum dots for the determination of theophylline

Zhou

Chen

Wang³

et al. 2019

Luminescence

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The chemiluminescence (CL) behaviour of the luminol-potassium periodate system enhanced by CdTe quantum dots capped with thioglycolic acid (TGA-CdTe QDs) was studied using kinetic experiments, CL spectra, UV-vis absorption spectra and fluorescence spectra. The production of oxygen-containing reactant intermediates (O 2•− and OH • ) in the present CL system was verified by CL. The possible CL mechanism was discussed in detail. Furthermore, theophylline (THP) was determined based on its enhancement of the CL intensity of the CdTe QDs-luminol-potassium periodate system coupled with a flow-injection technique. Under these optimized conditions, the linear range was found to be from 1.0 × 10 −8 to 1.0 × 10 −5 g/mL with a detection limit of 2.8 × 10 −9 g/mL (3σ). The recoveries for the determination of THP in tablets were from 98.2 to 99.6%.

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Size–Dependent Active Effect of Cadmium Telluride Quantum Dots on Luminol–Potassium Periodate Chemiluminescence System for Levodopa Detection

Cited by 8 publications

References 27 publications

Preparation of Molecularly Imprinted Microspheres as Biomimetic Recognition Material for In Situ Adsorption and Selective Chemiluminescence Determination of Bisphenol A

Preparation of Molecularly Imprinted Microspheres as Biomimetic Recognition Material for In Situ Adsorption and Selective Chemiluminescence Determination of Bisphenol A

Voltammetric Determination of Levodopa Using Mesoporous Carbon—Modified Screen-Printed Carbon Sensors

Flow‐injection chemiluminescence of the luminol–potassium periodate system enhanced by TGA–capped CdTe quantum dots for the determination of theophylline

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