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In this study, a novel air-assisted liquid-liquid microextraction (AALLME) method was developed for the HPLC determination of bisphenols migration from disposable plastic lunch box to contacting water. The AALLME was carried out in commercially-available medical plastic syringes with low-density extraction solvent (n-octanol), and the reaction of NaHCO3 and HCl was introduced to simultaneously induce...
Hydrophobic nitrogen-doped carbon dots are prepared with energetic ionic liquid (1,3-dibutylimidazolium dicyandiamide, BbimDCN) as carbon source. A yield of as high as 58% is obtained for the carbon dots, shortly termed as BbimDCN-OCDs, due to the presence of thermal-instable N(CN)2- moiety. BbimDCN-OCDs exhibit favorable biocompability and excellent imaging capacity for fluorescence labelling of...
Ion mobility spectrometry (IMS) opened a potential avenue for the rapid detection of organophosphorus pesticides (OPPs), though an improved selectivity of stand-alone IMS was still in high demand. In this study, a stand-alone positive photoionization ion mobility spectrometry (PP-IMS) apparatus was constructed for the rapid detection of OPPs with acetone as dopant. The photoionization of acetone molecules...
A highly sensitive “two-site” chemiluminescent immunoassay specific for human thyroid stimulating hormone (TSH) was developed. The signal amplification was achieved via a biotin–streptavidin system (BSAS). The HRP–luminol–H 2 O 2 chemiluminescent system with high sensitivity was chosen as the detection system. Biotinylated anti-TSH monoclonal antibody (MAb) and HRP-labeled streptavidin...
A novel method for the determination of peroxynitrite using folic acid as a fluorescent probe is described. The method is based on the oxidation of the reduced, low-fluorescent folic acid by peroxynitrite to produce a high-fluorescent emission product. The fluorescence increase is linearly related to the concentration of peroxynitrite in the range of 3×10 −8 to 5.0×10 −6 molL −1...
Electrochemiluminescence (ECL) detection with capillary electrophoresis (CE) separation system was used to the rapid analysis of mefenacet within 7min. The linear response range of mefenacet was from 1.07×10 −8 to 5.0×10 −7 M with a detection limit of 4.0×10 −9 M. This technique was also applied to analyze residues of mefenacet in seedling and soil.
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