Abstract
A new sensitive fluorescent probe (CDs-AgNP/H2O2) for detecting sulfite and bisulfite (SO32- and HSO3-) based on theinner-filter effect (IFE) between silver nanoparticles (AgNPs) and carbon dots (CDs) was developed. Because of the spectral overlap between the absorption of AgNPs and the excitation of CDs, the fluorescence of CDs can be quenched by AgNPs owing to the IFE. H2O2 weakens the IFE and restores the fluorescence due to the oxidation of AgNPs by H2O2. However, the existence of SO32-/HSO3- can quench the fluorescence again as a result of redox reaction between SO32-/HSO3- and H2O2. The results showed a broad linear range of 20-200 μM with a low limit of detection (3.02 μM) toward SO32-/HSO3-. Thecombination of IFE and redox reaction led to improvement of the sensitivity and selectivity. Theprobe was implemented to measure SO32-/HSO3- in various agricultural products and foods with acceptable results (80.6 to 118.9%recovery).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
