Method for highly-sensitive and rapid detection of pesticide residue based on imprinted metal-organic framework probe

• Main Authors: Tingting Shen, Xiaodong Zhai, Xinai Zhang, Zhihua Li, Xiaowei Huang, Jiyong Shi, Xiaobo Zou, Zhiming Guo, Xueyue Huang, Di Zhang, Xuetao Hu
• Format: Patent
• Language: English
• Published: 01.03.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A method for detection of pesticide residue based on an imprinted metal-organic framework (MOF) probe. The method constructs a colorimetric test strip based on an MOF enzyme-mimic probe, where a molecularly imprinted MOF probe is used as a colorimetric probe to catalyse the oxidation of a substrate, thereby enabling colour change; filter paper is used as a substrate for supporting the colorimetric probe, including a quality control zone, standard zone, and detection zone; in the quality control zone, the optimal colorimetric analysis parameters are selected according to an environment to be tested; the standard zone is a standard colorimetric zone obtained through dropwise addition of standards with different concentrations and is provided to establish a colorimetric analysis mathematical model; and the detection zone is provided for detection of an actual sample. A concentration range of a pesticide residue in a test sample can be preliminarily determined by the colorimetric test strip; and a gray value thereof is further calculated based on a colour signal of a reaction system; a colorimetric analysis model is established for quantitative analysis of trace pesticide residues in multiple complex matrix samples.