Ratiometric fluorescent sensing carbendazim in fruits and vegetables via its innate fluorescence coupling with UiO-67.
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%.
['Han|Yong|Y|', 'He|Xie|X|', 'Yang|Weixia|W|', 'Luo|Xueli|X|', 'Yu|Ying|Y|', 'Tang|Wenzhi|W|', 'Yue|Tianli|T|', 'Li|Zhonghong|Z|']
D001562:Benzimidazoles D002219:Carbamates D005504:Food Analysis D005506:Food Contamination D005638:Fruit D057230:Limit of Detection D000073396:Metal-Organic Frameworks D010573:Pesticide Residues D013050:Spectrometry, Fluorescence D014675:Vegetables
Ratiometric fluorescence Carbendazim 1,4-Biphenyldicarboxylic acid (PubChem CID: 67437721) Acetic acid (PubChem CID: 176) Acetonitrile (PubChem CID: 6342) Carbendazim (PubChem CID: 25429) Food safety Formic acid (PubChem CID: 284) Fructose (PubChem CID: 5984) Imidacloprid (PubChem CID: 86287518) L(+)-Cysteine (PubChem CID: 5862) Lysine (PubChem CID: 5962) MOFs N, N-dimethylformamide (PubChem CID: 6228) Pesticide Sodium chloride (PubChem CID: 5234) Thiophanate-methyl (PubChem CID: 3032791) Vitamin C (PubChem CID: 54670067) Zinc sulfate (PubChem CID: 24424) Zircomiun tetrachloride (PubChem CID: 9856075)