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Fe 3 O 4 @SiO 2 ‐PANI‐Au Nanocomposite Prepared for Electrochemical Determination of Quercetin in Food Samples and Biological Fluids
Author(s) -
Saljooqi Asma,
Shamspur Tayebeh,
Mostafavi Ali
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201900386
Subject(s) - nanocomposite , detection limit , electrochemical gas sensor , electrochemistry , materials science , electrode , quercetin , nuclear chemistry , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , chromatography , organic chemistry , antioxidant , engineering
A new electrochemical sensor based on Fe 3 O 4 @SiO 2 ‐PANI‐Au nanocomposite was fabricated for modification of glassy carbon electrode (Fe 3 O 4 @SiO 2 ‐PANI‐Au GCE). The Fe 3 O 4 @SiO 2 ‐PANI‐Au nanocomposite was characterized by TEM, FESEM‐EDS‐Mapping, XRD, and TGA methods. The Fe 3 O 4 @SiO 2 ‐PANI‐Au GC electrode exhibited an acceptable sensitivity, fast electrochemical response, and good selectivity for determination of quercetin. Under optimal conditions, the linear range for quercetin concentrations using this sensor was 1.0×10 −8 to 1.5×10 −5 mol L −1 , and the limit of detection was 3.8×10 −9 mol L −1 . The results illustrated that the offered sensor could be a possible alternative for the measurement of quercetin in food samples and biological fluids.