Triple dimensional spectroscopy combined with chemometrics for the discrimination of pesticide residues based on ionic liquid stabilized Mn ZnS quantum dots and covalent organic frameworks.
Manganese doped zinc sulfide quantum dots (Mn ZnS QDs) are promising candidates for multi channel sensing analysis due to their multi dimensional optical properties. In this study, we integrated amino silane and ionic liquid co modified Mn ZnS QDs and covalent organic frameworks (COFs) into optosensing nanoparticles to provide triple dimensional optical response signals and combined them with chemometrics for the analysis of multiple pesticide residues. Through the exploration and optimization of a series of conditions, fluorescence, room temperature phosphorescence, and ultraviolet visible combined with chemometrics were used for the discrimination and recognition of multiple pesticide residues in fruits and vegetables. The ionic liquid of 1 vinyl 3 ethylimidazolium tetrafluoroborate was used to modify Mn ZnS QDs to improve the optical response and enrichment of pesticide adsorption sites, which were also synergistically enhanced by the COF support. This is a potential method to discriminate pesticides efficiently and enables fast and reliable analysis of pesticides in the agricultural and food industries.
Food chemistry