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  • Title: Simultaneous determination of eleven quinolones in animal feed by liquid chromatography with fluorescence and ultraviolet absorbance detection.
    Author: Galarini R, Fioroni L, Angelucci F, Tovo GR, Cristofani E.
    Journal: J Chromatogr A; 2009 Nov 13; 1216(46):8158-64. PubMed ID: 19616214.
    Abstract:
    A rapid and simple multi-residue procedure is described for assaying eleven quinolones (cinoxacin, ciprofloxacin, danofloxacin, difloxacin, enrofloxacin, flumequine, marbofloxacin, nalidixic acid, norfloxacin, oxolinic acid and sarafloxacin) in feeds at sub-additive levels (1-5 mg kg(-1)). Five grams of sample were extracted by a metaphosphoric acid/acetonitrile mixture (70/30, v/v) and purified onto OASIS HLB cartridges. The determination was achieved by liquid chromatography (LC) using a GEMINI C18 analytical column both with fluorescence detection (FD) and photodiode-array (DAD). Limits of detection for each drug were in the range 0.04-0.8 mg kg(-1). Above the limit of quantification (LOQ), in poultry feed the recoveries were from 69 to 98% with relative standard deviations less than or equal 10%. Finally the measurement uncertainty was estimated using the bottom-up approach.
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