Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 895, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2021.115455
Keywords
Gold nanoparticles; Polyaniline; Molecular imprinted polymer; Resveratrol; Electrochemical detection
Categories
Funding
- National Natural Science Foundation of China [82060647, 21665004]
- Scientific and Tech-nological Innovation Major Base of Guangxi [201815Z04]
- State Project for Essential Drug Research and Development [2019ZX09301132]
- Guangxi Natural Science Foundation [2018GXNSFAA138022]
- Guangxi First-class Discipline Project for Pharmaceutical Sciences [GXFCDPPS2018]
- Guangxi Medi-cal University Training Program for Distinguished Young Scholars
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This study describes a highly sensitive molecular imprinted-based electrochemical sensor for resveratrol, which can be directly detected in wines without the requirement of sample pretreatment. The carefully investigated preparation conditions resulted in a high-performance MIP-based sensor for electrochemical sensing of resveratrol.
A highly sensitive molecular imprinted-based electrochemical sensor for resveratrol is described. Electrodeposition and electropolymerization techniques were successively used to prepare gold nanoparticles (AuNPs) and polyaniline (PANI) film on glassy carbon electrode. The as-formed porous PANI/AuNPs composite acted as a conducting network mediating electron transfer, and offered supporting matrix for anchoring the imprinted elements-polyacrylamide (PAM) that was chemically polymerized at the composite interface using acrylamide as functional monomer and resveratrol as template molecule in an amiable condition, thereby forming a molecular imprinted polymer (MIP) capable of specifically recognizing and electrochemically responding to resveratrol. The preparation conditions were carefully investigated aiming to obtain a high-performance MIP-based sensor for electrochemical sensing of resveratrol. Quantification was performed by differential pulse voltammetry in pH 4.0 phosphate buffer. The peak current was directly proportional to resveratrol concentration ranging from 1.0 mu M to 200 mu M, with detection limit of 87 nM. A variety of commonly coexisting ingredients such as ferulic acid, catechin, caffeic acid, vanillin, and protocatechin acid cannot produce detectable current signal in the given analytical condition, enabling the direct detection of resveratrol in wines without the requirement of sample pretreatment (e.g., chromatographic separation or solvent extraction).
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