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Simultaneous Determination and Identification of Furazolidone, Furaltadone, Nitrofurazone, and Nitrovin in Feeds by HPLC and LC‐MS

Abstract An HPLC and LC‐MS method for simultaneous determination of furazolidone, furaltadone, nitrofurazone, and nitrovin in feeds was developed. Samples were extracted with a mixture of acetonitrile and methanol with ammonia solution, and further clean‐up was achieved with solid‐phase extraction (SPE). Separation and quantitation of the analyte were developed with an acetonitrile‐water gradient program and UV absorbance at 365 nm. LC‐MS was in an electrospray positive ion mode. The limits of detection were 0.1 mg/kg for furazolidone and furaltadone, and 0.2 mg/kg for nitrofurazone and nitrovin; the limits of quantitation in feeds were 1 mg/kg for furazolidone and furaltadone, and 2 mg/kg for nitrofurazone and nitrovin.