Developing a magnetic SERS nanosensor utilizing aminated Fe-Based MOF for ultrasensitive trace detection of organophosphorus pesticides in apple juice

Nengjing Yang; Hongbin Pu; Da-Wen Sun

doi:10.1016/j.foodchem.2024.138846

Developing a magnetic SERS nanosensor utilizing aminated Fe-Based MOF for ultrasensitive trace detection of organophosphorus pesticides in apple juice

Food Chem. 2024 Jul 15:446:138846. doi: 10.1016/j.foodchem.2024.138846. Epub 2024 Feb 24.

Authors

Nengjing Yang¹, Hongbin Pu¹, Da-Wen Sun²

Affiliations

¹ School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.
² School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland. Electronic address: dawen.sun@ucd.ie.

PMID: 38460279
DOI: 10.1016/j.foodchem.2024.138846

Abstract

The unreasonable use of organophosphorus pesticides leads to excessive pesticide residues in food, seriously threatening public health, and the potential of surface-enhanced Raman spectroscopy (SERS) technology, incorporating a metal-organic framework, is substantial for the rapid detection of trace pesticide residues. Here, a novel Fe₃O₄@NH₂-MIL-101(Fe)@Ag (FNMA) SERS nanosensor was developed. Results indicated that the FNMA had a high enhancement factor of 1.53 × 10⁸, a low limit of detection (LOD) of 4.55 × 10^-12 M, and a relative standard deviation of 7.73 % for 4-nitrothiophenol, demonstrating its good SERS sensitivity and uniformity, and also possessed good storage stability for one month. In quantifying fenthion and methyl parathion in standard solutions and apple juice in the range of 0.05/0.02-20 mg/L, it showed LODs of 3.02 × 10^-3 mg/L and 1.43 × 10^-3 mg/L, and 0.0407 and 0.0075 mg/L, respectively, demonstrating potentials in ultrasensitive trace detection of pesticides in food.

Keywords: Fe(3)O(4)@NH(2)-MIL-101(Fe)@Ag; Fruit; Metal-organic framework; Organophosphorus pesticide residues; SERS.

MeSH terms

Fruit / chemistry
Magnetic Phenomena
Malus* / chemistry
Metal Nanoparticles* / chemistry
Organophosphorus Compounds / analysis
Pesticide Residues* / analysis
Pesticides* / analysis
Spectrum Analysis, Raman / methods

Substances

Pesticides
Pesticide Residues
Organophosphorus Compounds