Synthesis of multiwalled carbon nanotubes/metal-organic framework composite for the determination of neonicotinoid pesticides in medicine and food homology products

Fabrication of Nitrogen Based Magnetic Conjugated Microporous Polymer for Efficient Extraction of Neonicotinoids in Water Samples

“…For a further evaluation of the analytical performance of the proposed method, it was compared with other methods reported in the literature (Table 3). Compared with SPME-UPLC-MS/MS [17], DSPE-UPLC-MS/MS [18,19], and MSPE-HPLC-MS [25,52], the current MSPE-HPLC-DAD method displayed higher LODs, because the MS detection promoted higher sensitivity towards NEOs than DAD detection. However, MS detection is more expensive than DAD detection.…”

“…The direct determination of NEOs is extremely difficult because of their low concentration in complex matrices. Appropriate sample pretreatment methods such as solid-phase extraction (SPE) [14], solidphase microextraction (SPME) [17], dispersed solid-phase extraction (DSPE) [4,18,19], and magnetic solid-phase extraction (MSPE) [20] are necessary prior to chromatographic analysis. Among those methods, MSPE has generated widespread attention in the sample pretreatment field owing to its inherent advantages, including efficient extraction phenomenon, rapid separation, low consumption of organic solvents, and appropriate recycling of sorbents [21,22].…”

“…Magnetic porous materials have also been successfully applied in the extraction of NEOs. These include magnetic graphene oxide (GO) [23], magnetic nanocellulose (MNC) [24], magnetic metal-organic frameworks (MOFs) [18,25], magnetic porphyrin organic polymer [26,27], magnetic hyper-crosslinked polymer (MHCPs) [28], and magnetic covalent organic frameworks [29,30]. However, magnetic graphene oxide, magnetic nanocellulose, and magnetic hyper-crosslinked polymer exhibited a poorly selective extraction capacity towards NEOs, and magnetic MOFs displayed weak stability under acidic and alkaline conditions.…”

Fluorescence Quenching Detection of Clothianidin in Fruit and Vegetable Samples Using MAPbBr3 Perovskite Quantum Dots

“…Current techniques for the detection of neonicotinoids include both chemical and optical detection methods: high-performance liquid chromatography (HPLC), liquid chromatography-tandem mass spectrometry (LC–MS/MS), − surface enhanced Raman spectroscopy (SERS), , enzyme-linked immunosorbent assay (ELISA), , and electrochemical, − electrochemiluminescence (ECL), and fluorescence (FL) spectrophotometry. − Thereinto, FL sensors based on quantum dots (QDs) are extensively utilized due to their simplicity, high sensitivity, high selectivity, stability, and applicability. QDs are semiconductor nanocrystals with size-tunable optical and electronic properties and have found applications in light-emitting diodes, biotechnology, catalysis, sensors, and solar cells .…”