Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 406, Issue 11, Pages 2669-2677Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-014-7665-3
Keywords
Ionic liquid; Magnetic polymeric microspheres; Dispersive solid phase extraction; Sulfonamides; Urine
Funding
- National Natural Science Foundation of China [21175031, 31301464]
- Natural Science Foundation of Hebei [B2012201052]
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Ionic liquid-modified magnetic polymeric microspheres (ILMPM) were prepared based on Fe3O4 magnetic nanoparticles (MNPs) and ionic liquids (ILs) incorporated into a polymer. The composites were characterized using scanning electron microscopy, Fourier transform infrared analysis, thermogravimetric analysis, X-ray diffraction, and vibrating magnetometer, which indicated that ILMPM had a regularly spherical shape and strong magnetic property. The obtained ILMPM were successfully applied as a special adsorbent of magnetic dispersive solid phase extraction (MDSPE) for the rapid extraction and isolation of sulfamonomethoxine sodium and sulfachloropyrazine sodium in urine. The factors that affected extraction efficiency, such as adsorption conditions, desorption conditions, washing and elution solvents, and pH of the sample solution, were optimized. Under the optimum condition, good linearity in the range of 0.005-2.0 mu g g(-1) (r a parts per thousand yenaEuro parts per thousand 0.9996) was obtained for the two sulfonamides (SAs); the average recoveries at three spiked levels ranged from 86.9 to 102.1 %, with relative standard deviations of a parts per thousand currency sign4.3 %. The presented ILMPM-MDSPE method combined the advantages of ILs, MNPs, and MDSPE and therefore could be potentially applied for rapid screening of SAs in urine.
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