| Literature DB >> 28490057 |
Wengang Zhang1, Yong Han1, Xiumei Chen1, Xueli Luo1, Jianlong Wang1, Tianli Yue1, Zhonghong Li2.
Abstract
A Mn-doped ZnS quantum dots (QDs) based nanosensor for selective phosphorescent determination of patulin (PAT) was synthesized with 6-hydroxynicotinic acid (6-HNA) as dummy template via a surface molecular imprinting sol-gel process. FTIR and XRD indicated the successful graft of molecularly imprinted polymer (MIP) onto crystal QDs. Binding tests revealed that the MIP-QDs presented higher selectivity, adsorption capacity and mass transfer rate than non-imprinted polymers, demonstrating a specific recognition for PAT among competitive mycotoxins and its analogues with the imprinting factor of 2.02. The MIP-QDs could recognize PAT in a linear range of 0.43-6.50μmolL-1 with a detection limit of 0.32μmolL-1 and a correlation coefficient (R2) of 0.9945. Recoveries of 102.9-127.2% with relative standard deviations <4.95% were achieved in apple juice samples which were in good agreement with high-performance liquid chromatography (HPLC) (P>0.05). The results indicated a simple phosphorescent nanosensor for PAT detection in complex matrix.Entities:
Keywords: Apple juice; Molecular imprinting; Nanosensor; Patulin; Phosphorescence detection; Quantum dots
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Year: 2017 PMID： 28490057 DOI： 10.1016/j.foodchem.2017.03.156
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514