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Electrochimica Acta

Electrochimica Acta

IF: 5.5
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Dual function AgNPs@ UiO-66 based ratiometric electrochemical sensor for rapid and sensitive determination of luteolin in plants

Published:11 December 2024 DOI: 10.1016/j.electacta.2024.145505
Zixuan Wang, Juan Peng, Houlin Li, Ganghui Chu

Abstract

Luteolin is a variety of bioactive flavonoids, it is of great significance to quickly and accurately determine the content of luteolin. This paper established a simple and rapid ratiometric electrochemical sensor for the sensitive determination of luteolin. Nano-flowering zirconium-based metal-organic frameworks (UiO-66) were synthesized and silver nanoparticles (AgNPs) were directly grown on the surface of UiO-66 to prepare AgNPs@UiO-66 composites. Then, AgNPs@UiO-66 was drop-coated on the electrode surface to prepare the ratiometric electrochemical sensor. AgNPs@UiO-66 has the dual function of providing a stable internal reference signal and enhancing the electrochemical signal. Under optimal conditions, the peak current of luteolin (ILuteolin) increased with increasing luteolin concentration, while the peak current of AgNPs@UiO-66 (IAgNPs@UiO-66), which is used as an internal reference signal, remained relatively stable. ILuteolin/IAgNPs@UiO-66 showed a good linear relationship in the range of 0.07 - 0.9 μM and 0.9 - 40 μM, and the limit of detection (LOD) was 0.017 μM (S/N?=?3). The sensor detected luteolin in peanut shells with recoveries ranging from 96.7% to 107%, which agreed with ultraviolet-visible spectroscopy. These results demonstrate the possibility of this ratiometric electrochemical sensor for detecting luteolin in real life.

Substances (9)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Acetic acid 64-19-7 C2H4O2 1775 suppliers $10.00-$9280.00
Potassium chloride 7447-40-7 KCl 1594 suppliers $6.00-$12480.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1313 suppliers $11.20-$12200.00
Chitosan 9012-76-4 C6H11NO4X2 1019 suppliers $13.00-$1125.56
Methanol 67-56-1 CH4O 895 suppliers $9.00-$7620.00
Sodium Phosphate, Dibasic 7558-79-4 Na2HPO4 873 suppliers $9.00-$5290.00
Luteolin 491-70-3 C15H10O6 753 suppliers $5.00-$1595.00
Terephthalic acid 100-21-0 C8H6O4 713 suppliers $4.00-$3418.80
potassium ferricyanide 13746-66-2 C6FeN6.3K 524 suppliers $7.62-$15160.00

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