Ratiometric fluorescent sensing carbendazim in fruits and vegetables via its innate fluorescence coupling with UiO-67. (30th May 2021)

• Record Type: Journal Article
• Authors: Han, Yong; He, Xie; Yang, Weixia; Luo, Xueli; Yu, Ying; Tang, Wenzhi; Yue, Tianli; Li, Zhonghong
• Is Part Of: Food chemistry. Volume 345(2021)
• Publication Date: 2021-05-30
• Subjects: MBC Carbendazim -- MOFs Metal-Organic Frameworks -- PET Photoinduced Electron Transfer -- FL fluorescence -- BPDC 1, 4-Biphenyldicarboxylic acid -- Cys Cysteine -- Lys Lysine -- Phe Phenylalanine -- UW Ultrapure Water -- BR Britton-Robinson -- SEM Scanning Electron Microscopy -- FTIR Fourier Transform Infrared Spectroscopy -- XPS X-ray Photoelectron Spectroscopy -- LOD Limit of Detection -- LOQ Limit of Quantitation -- RSDs Relative Standard Deviations; Food safety -- Ratiometric fluorescence -- MOFs -- Pesticide -- Carbendazim; Carbendazim (PubChem CID: 25429) -- Thiophanate-methyl (PubChem CID: 3032791) -- Imidacloprid (PubChem CID: 86287518) -- 1, 4-Biphenyldicarboxylic acid (PubChem CID: 67437721) -- Zircomiun tetrachloride (PubChem CID: 9856075) -- N, N-dimethylformamide (PubChem CID: 6228) -- Acetic acid (PubChem CID: 176) -- Formic acid (PubChem CID: 284) -- Acetonitrile (PubChem CID: 6342) -- Sodium chloride (PubChem CID: 5234) -- Zinc sulfate (PubChem CID: 24424) -- Lysine (PubChem CID: 5962) -- L(+)-Cysteine (PubChem CID: 5862) -- Vitamin C (PubChem CID: 54670067) -- Fructose (PubChem CID: 5984); Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.128839
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: Innate fluorescence of MBC as a response signal of ratiometric fluorescent sensor. Innate fluorescence of MBC endows the sensor with ultra-high selectivity. π-π stacking induced recognition between MBC and UiO-67 with "turn-off" fluorescence. Reverse response of two signals enhances the sensibility with LOD of 3 nmol/L. High anti-interference capability in food samples. Abstract: A ratiometric fluorescent sensor was facilely fabricated using innate fluorescence of carbendazim (MBC) and fluorescent UiO-67 to sensitively and selectively detect MBC in food matrixes. The innate fluorescence of MBC provided a signal at 311 nm (F311 ), and the fluorescent UiO-67 at 408 nm (F408 ) could recognize MBC through π-π stacking inducing fluorescent quenching relied on photoelectron transfer (PET). The ratio (F311 /F408 ) of the fluorescence enhancement of MBC and the quenching of UiO-67 linearly responded to the MBC concentrations of 0–47.6 μmol/L with a low limit of detection (LOD) of 3.0 × 10 −3 μmol/L. The reverse response signals of the sensor enhanced the sensitivity toward MBC and presented remarkable anti-interference capability in complex matrices. The as-prepared sensor was applied to detect MBC residues in apple, cucumber and cabbage, obtaining satisfactory accuracy and precision with the recovery of 90.82–103.45% and RSDs of lower than 3.03%.