High-performance liquid chromatography determination of Zn-bacitracin in animal feed by post-column derivatization and fluorescence detection.
A sensitive and selective method is presented for the determination of Zn-Bacitracin in adulterated animal feed by reversed-phase ion-pair high-performance liquid chromatography and post-column derivatization with o-phthalaldehyde prior to fluorescence detection. The calibration function was estimated to be between 8.0 and 65.0 mg l(-1) of Zn-BC. The detection and quantification limits of the chromatographic method were 2.5 and 7.5 mg 1(-1), respectively. Using the extraction procedure of Zn-Bacitracin from the feedstuff that we recently proposed and applying this new chromatographic method, it was possible to detect this antibiotic at levels below 5 mg kg(-1) in different kinds of feedstuffs with a standard deviation less than 6.0%.
Capitan-Vallvey
L F
LF
Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Spain. lcapitan@ugr.es
Titos
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Checa
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Navas
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D000821:Animal Feed / Q000032:analysis*; D001414:Bacitracin / Q000032:analysis*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*
D001414:Bacitracin