NDLI: A non-enzyme hydrogen peroxide sensor based on core/shell silica nanoparticles using synchronous fluorescence spectroscopy

Content Provider	Springer Nature Link
Author	Luo, Fabao Yin, Jun Gao, Feng Wang, Lun
Copyright Year	2008
Abstract	In our previous study, we have prepared aminated fluorescent silica nanoparticles doped with fluorescein isothiocyanate (FITC) (FSNPs) for the sensing of γ-globulin. Compared with conventional organic dyes, FSNPs show superiorities such as excellent photostability, good water solubility, and biocompatibility, which are in favor of improving the stability and sensitivity of sensors. To extend the application of FSNPs, a convenient and effective method for non-enzyme fluorescent sensor of hydrogen peroxide (H2O2) is introduced based on the synchronous fluorescence technique. The sensor includes two-step reactions, typical redox reaction between KI and H2O2 and iodination reaction between I2 produced by the first step reaction and FITC doped in the network of silica nanoparticles, which induce the fluorescence quenching of FSNPs. The results show that the fluorescence signal of FSNPs linearly decreases with the trace amounts of hydrogen peroxide added in the range 5–80 μM with a detection limit of 0.8 μM under the optimal experimental conditions. The method is simple and sensitive and can be applied to the determination of trace amounts of H2O2. Good recovery data were obtained for the assay of H2O2 in river water by standard addition method with high accuracy and reliability.
Starting Page	23
Ending Page	28
Page Count	6
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	165
Issue Number	1-2
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2008-08-09
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Amino-modified silica nanoparticles (FSNPs) Fluorescein isothiocyanate (FITC) Hydrogen peroxide (H2O2) Synchronous fluorescence Ecotoxicology Characterization and Evaluation of Materials Physical Chemistry Inorganic Chemistry Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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