Determination of Nitrofuran Metabolites in Muscular Tissue by High-Performance Liquid Chromatography with Mass Spectrometric Detection

Abstract

We developed a procedure for determining residual amounts of four nitrofuran metabolites (3‑amino-2-oxazolidinone, 3-amino-5-methylmorpholino-2-oxazolidinone, 1-aminohydantoin hydrochloride, and semicarbazide hydrochloride) in muscle tissue in the form of 2-nitrophenyl derivatives by HPLC with selected reaction monitoring mass spectrometric detection. The effect of the matrix suppression of ionization is shown. The selectivity of extraction is increased by optimizing the sample preparation procedure, and the effect of organic impurities on the result measurements is minimized. The lower limit of the analytical range is 10 μg/kg for semicarbazide hydrochloride and 1 μg/kg for the remaining nitrofuran metabolites.