Preparation of monolithic fibers based on dual functional monomers for solid-phase microextraction of sudan dyes in tomato sauce and egg yolk samples

摘要: New monolithic fibers based on dual functional monomers were prepared and applied to the solid-phase microextraction determination of sudan dyes (I, II, III IV) in tomato sauce egg yolk samples by coupling with high-performance liquid chromatography. Octadecyl methacrylate vinylimidazole used as copolymerize divinylbenzene form fibers. The effect preparation conditions extraction efficiencies was investigated detail. Elemental analysis, infrared spectroscopy, mercury intrusion porosimetry scanning electron microscopy characterize materials. In optimized process, several extractive parameters including desorption solvent, time, pH values ionic strength sample matrix, thoroughly. Under conditions, limits detection (S/N = 3) for 0.07–1.46 μg kg−1 0.14–2.07 yolk, respectively. Method repeatability achieved terms intra- inter-day precisions, indicated RSDs, which both <10%. Satisfactory recoveries spiked target analytes these ranged from 71.4% 110%, RSD less than 11%.