A Novel CdSe/ZnS Quantum Dots Fluorescence Assay Based on Molecularly Imprinted Sensitive Membranes for Determination of Triazophos Residues in Cabbage and Apple

Hong, Sihui; She, Yongxin; Cao, Xiaolin; Wang, Miao; He, Yahui; Zheng, Lirong; Wang, Shanshan; El‐Aty, A.M. Abd; Hacımüftüoğlu, Ahmet; Yan, Mengmeng; Wang, Jing

doi:10.3389/fchem.2019.00130

Cited by 18 publications

(4 citation statements)

References 26 publications

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“…The fluorescence characteristic changes depending on how many fluorescent indicators are replaced 18 . For example, Hong et al developed a competitive CdSe/ZnS quantum dot fluorescence assay based on micro-array-imprinted membranes for the determination of triazophos 19 . Furthermore, in order to take advantage of the nano-fluorescence probe in sensing mechanism, the fluorescent nano-materials not only act as fluorescent labels but also as a sensitive sensing source in indirect sensing system.…”

Section: Introductionmentioning

confidence: 99%

Molecular imprinting-based indirect fluorescence detection strategy implemented on paper chip for non-fluorescent microcystin

Li,

Qi,

Liu

et al. 2023

Nat Commun

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Fluorescence analysis is a fast and sensitive method, and has great potential application in trace detection of environmental toxins. However, many important environmental toxins are non-fluorescent substances, and it is still a challenge to construct a fluorescence detection method for non-fluorescent substances. Here, by means of charge transfer effect and smart molecular imprinting technology, we report a sensitive indirect fluorescent sensing mechanism (IFSM) and microcystin (MC-RR) is selected as a model target. A molecular imprinted thin film is immobilized on the surface of zinc ferrite nanoparticles (ZnFe2O4 NPs) by using arginine, a dummy fragment of MC-RR. By implementation of IFSM on the paper-based microfluidic chip, a versatile platform for the quantitative assay of MC-RR is developed at trace level (the limit of detection of 0.43 μg/L and time of 20 min) in real water samples without any pretreatment. Importantly, the proposed IFSM can be easily modified and extended for the wide variety of species which lack direct interaction with the fluorescent substrate. This work offers the potential possibility to meet the requirements for the on-site analysis and may explore potential applications of molecularly imprinted fluorescent sensors.

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Section: Introductionmentioning

confidence: 99%

Molecular imprinting-based indirect fluorescence detection strategy implemented on paper chip for non-fluorescent microcystin

Li,

Qi,

Liu

et al. 2023

Nat Commun

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“…Molecular imprinting technology synthesizes highly crosslinked MIPs through template orientation, generating cavities that mimic binding sites of antibodies, enzymes, and other biological materials, and give priority to bind with template molecules, providing an effective method for molecular recognition (Hrobonova et al, 2018;Liang et al, 2018;Hong et al, 2019;Ma et al, 2019). MIPs have attracted wide attention in the fields of solid phase extraction, sensors, antibodies, enzyme simulation, receptors, and catalysts (Zhang et al, 2013;Ansari and Karimi, 2017;Diltemiz et al, 2017;Xiao et al, 2018;Yu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Selective Adsorption and Purification of the Acteoside in Cistanche tubulosa by Molecularly Imprinted Polymers

2020

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Acteoside (ACT) is the main component of phenylethanoid glycosides in Cistanche tubulosa, and it is extremely desirable for obtaining high purification of ACT by molecularly imprinted polymers (MIPs) from their extracts. In this study, MIPs were designed and synthetized to adsorb selectively the ACT in C. tubulosa. The effects of different functional monomers, cross-linkers, and solvents of MIPs were investigated. MIPs were studied in terms of static adsorption experiments, dynamic adsorption experiments, and selectivity experiments. The optimal functional monomer, cross-linking agent, and solvent are 4-vinylpyridine, ethylene glycol dimethylacrylate, and the mixed solvent (acetonitrile and N,N-dimethylformamide, 1:1.5, v/v), respectively. Under the optimal conditions, the synthesized MIP1 has a high adsorption performance for ACT. The adsorption capacity of MIP1 to ACT reached 112.60 mg/g, and the separation factor of ACT/echinacoside was 4.68. Because the molecularly imprinted cavities of MIP1 resulted from template molecules of ACT, it enables MIP1 to recognize selectively ACT. Moreover, the N-H groups on MIP1 can form hydrogen bonds with the hydroxyl groups on the ACT; this improves the separation factor of MIP1. The dynamic adsorption of ACT accorded with the quasi-second-order kinetics; it indicated that the adsorption process of MIP1 is the process of chemical adsorption to ACT. MIPs can be applied as a potential adsorption material to purify the active ingredients of herbal medicines.

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“…Triazophos/ triazofos (TZP, C 12 H 16 N 3 O 3 PS; Figure 1) is an organophosphate pesticide used in acaricides, insecticides, and nematicides. Several Asian countries use TZP in vegetables, rice, tea, and fruits (Hong et al, 2019;Huan et al, 2016). However, the widespread of TZP presented a risk to human health.…”

Section: Introductionmentioning

confidence: 99%

Rapid detection of triazophos in cucumber using lateral flow immunochromatographic assay

Suryoprabowo

Kuang

et al. 2020

Food and Agricultural Immunology

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In developing countries, pesticides such as triazophos (TZP) are widely used in agriculture. However, the misuse TZP poses a threat to human health and the environment due to its high chemical and photochemical stability. In this study, we developed a lateral flow assay to determine TZP in cucumber. We produced anti-TZP monoclonal antibody with half inhibitory concentration of 2.013 ng/mL according to ELISA. Under optimum conditions, the lateral flow assay had TZP cutoff values of 100 ng/mL in 0.01 M PBS and 250 ng/mL in cucumber, and the results could be visualised with the naked eye in 5 min. our findings revealed that lateral flow assay is a rapid and sensitive method for detect TZP in cucumber.

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A Novel CdSe/ZnS Quantum Dots Fluorescence Assay Based on Molecularly Imprinted Sensitive Membranes for Determination of Triazophos Residues in Cabbage and Apple

Cited by 18 publications

References 26 publications

Molecular imprinting-based indirect fluorescence detection strategy implemented on paper chip for non-fluorescent microcystin

Molecular imprinting-based indirect fluorescence detection strategy implemented on paper chip for non-fluorescent microcystin

Selective Adsorption and Purification of the Acteoside in Cistanche tubulosa by Molecularly Imprinted Polymers

Rapid detection of triazophos in cucumber using lateral flow immunochromatographic assay

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