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Reference type: Journal
Authors: Zhou T, Yang HC, Jin Z, Liu QY, Song XQ, He LM, Fang BH, Meng CY
Article Title: Determination of azithromycin residue in pork using a molecularly imprinted monolithic microcolumn coupled to liquid chromatography with tandem mass spectrometry.
Publication date: 2016
Journal: Journal of Separation Science
Volume: 39
Issue: (7)
Page numbers: 1339-1346.
DOI: 10.1002/jssc.201501249

Abstract: Using spiramycin as a dummy template, a molecularly imprinted polymer monolithic micro-column with high selection to azithromycin was prepared in a micropipette tip. The imprinting factor of the monolithic micro-column prepared was approximately 2.67 and the morphological structure of the polymers was characterized by scanning electron microscopy. A simple, sensitive, and reproducible method based on the imprinted monolithic micro-column coupled to liquid chromatography with tandem mass spectrometry was developed for determining the residues of azithromycin in pork. Pork samples were extracted with acetonitrile, cleaned up under the optimal monolithic micro-column conditions, and analyzed using liquid chromatography with tandem mass spectrometry in the multiple reaction monitoring mode. The assay exhibited a linear dynamic range of 0.50-50 μg/L with the correlation coefficient (r2) above 0.99. In the three spiking levels of 0.50, 1.0, and 10 μg/kg, the average recoveries of azithromycin from pork samples were between 85.8 and 96.5% with a relative standard deviation below 10%. The limit of detection and limit of quantitation were 0.03 and 0.1 μg/kg, respectively
Template and target information: spiramycin, dummy template, azithromycin
Author keywords: Azithromycin, Liquid chromatography with tandem mass spectrometry, Molecularly imprinted polymers, Monolithic microcolumns, Pork

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