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Reference type: Journal
Authors: Yan H, Row KH
Article Title: Novel molecularly imprinted monolithic column for selective on-line extraction of ciprofloxacin from human urine.
Publication date: 2008
Journal: Biomedical Chromatography
Volume: 22
Issue: (5)
Page numbers: 487-493.
DOI: 10.1002/bmc.957

Abstract: Water-compatible ciprofloxacin-imprinted monolithic columns were synthesized in water-containing systems for selective extraction of ciprofloxacin from human urine samples. Methanol-water (10:3, v/v) was used as a porogenic solvent and the obtained monolithic imprinted polymers reveal high selectivity to ciprofloxacin in an aqueous environment; the affinity can be easily controlled by adjusting the pH of the mobile phase. Owing to the unique porous structure and flow-through channels existing in the network skeleton of the monolithic MIP, urine samples could be directly injected into the column, proteins and other biological matrix were quickly washed out and ciprofloxacin was selectively retained and enriched. Good linearity was obtained from 0.08 to 400 mg/L (r = 0.998) with the relative standard deviations less than 3.6%. The limit of detection of the method was 0.04 mg/L and the recoveries were more than 94.5% at three different concentrations. Moreover, by increasing the injection volume to 2.0 mL, the sensitivity of the method could be improved 100-fold according to the peak height of ciprofloxacin. This expedient greatly simplified the overall procedure, resulting in a rapid and efficient sample analysis while maintaining precision and accuracy. Copyright 2007 John Wiley & Sons, Ltd
Author keywords: monolithic column, molecularly imprinted polymer, selective on-line extraction, Ciprofloxacin, human urine


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