UM
Fluorometric determination of pesticides and organophosphates using nanoceria as a phosphatase mimic and an inner filter effect on carbon nanodots
Wei J.; Yang Y.; Dong J.; Wang S.; Li P.
2019-02-01
Source PublicationMicrochimica Acta
ISSN14365073 00263672
Volume186Issue:2
AbstractNanoceria with a remarkable phosphatase mimicking activity was synthesized and used to catalyze the hydrolysis of phosphate esters in pH 10 solution. The catalytic effect of nanoceria was firstly investigated by selecting p-nitrophenyl phosphate as a model substrate. The pH value, incubation temperature, reaction time, and concentration of nanoceria were optimized. The catalytic effect was then confirmed by using methyl-paraoxon as a substrate. The p-nitrophenol anion released by the enzyme mimic is yellow and exerts an inner filter effect on the fluorescence of the carbon dots (with excitation/emission maxima at 400/520 nm). Response to methyl-paraoxon is linear in the 1.125–26.25 μmol L concentration range. The method was applied to the determination of pesticides in spiked Panax quinquefolius and water samples. Recoveries ranged from 85 to 103% (n = 3). The technique is rapid, reliable, and can be used for on-site detection of pesticides and organophosphates. [Figure not available: see fulltext.].
KeywordCeO 2 Environmental pollution Fluorescence Nanomaterial Nanoparticle Nanozyme Probe Sensor Water pollution
DOI10.1007/s00604-018-3175-x
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
AffiliationUniversidade de Macau
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GB/T 7714
Wei J.,Yang Y.,Dong J.,et al. Fluorometric determination of pesticides and organophosphates using nanoceria as a phosphatase mimic and an inner filter effect on carbon nanodots[J]. Microchimica Acta,2019,186(2).
APA Wei J.,Yang Y.,Dong J.,Wang S.,&Li P..(2019).Fluorometric determination of pesticides and organophosphates using nanoceria as a phosphatase mimic and an inner filter effect on carbon nanodots.Microchimica Acta,186(2).
MLA Wei J.,et al."Fluorometric determination of pesticides and organophosphates using nanoceria as a phosphatase mimic and an inner filter effect on carbon nanodots".Microchimica Acta 186.2(2019).
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