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Molecularly Imprinted Poly(thionine)-Based Electrochemical Sensing Platform for Fast and Selective Ultratrace Determination of Patulin.
- Source :
-
Analytical chemistry [Anal Chem] 2019 Mar 19; Vol. 91 (6), pp. 4116-4123. Date of Electronic Publication: 2019 Mar 06. - Publication Year :
- 2019
-
Abstract
- An innovative approach based on a surface functional monomer-directing strategy for the construction of a sensitive and selective molecularly imprinted electrochemical sensor for patulin recognition is described. A patulin imprinted platinum nanoparticle (PtNP)-coated poly(thionine) film was grown on a preformed thionine tailed surface of PtNP-nitrogen-doped graphene (NGE) by electropolymerization, which provided high capacity and fast kinetics to uptake patulin molecules. Thionine acted not only as a functional monomer for molecularly imprinted polymer (MIP), but also as a signal indicator. Enhanced sensitivity was obtained by combining the excellent electric conductivity of PtNPs, NGE, and thionine with multisignal amplification. The designed sensor displayed excellent performance for patulin detection over the range of 0.002-2 ng mL <superscript>-1</superscript> (R <superscript>2</superscript> = 0.995) with a detection limit of 0.001 ng mL <superscript>-1</superscript> for patulin. In addition, the resulting sensor showed good stability and high repeatability and selectivity. Furthermore, the feasibility of its applications has also been demonstrated in the analysis of real samples, providing novel tactics for the rational design of MIP-based electrochemical sensors to detect a growing number of deleterious substances.
- Subjects :
- Biosensing Techniques
Limit of Detection
Malus chemistry
Mutagens chemistry
Nanoparticles chemistry
Patulin chemistry
Patulin isolation & purification
Vitis chemistry
Chromatography, Affinity methods
Electrochemical Techniques methods
Fruit and Vegetable Juices analysis
Molecular Imprinting methods
Mutagens analysis
Patulin analysis
Phenothiazines chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1520-6882
- Volume :
- 91
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Analytical chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 30793880
- Full Text :
- https://doi.org/10.1021/acs.analchem.8b05791