Green and simple analytical method to determine benzimidazoles in milk samples by using salting-out assisted liquid-liquid extraction and capillary liquid chromatography

Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Carmen Tejada-CasadoFrancisco J Lara

Abstract

A green and simple multiresidue method using capillary liquid chromatography (CLC) with UV-diode array detection (DAD) has been developed for the determination of sixteen benzimidazoles (BZs) and its metabolites in milk samples. The separation was achieved in <32 min, using a Zorbax XDB-C18 column (150 mm × 0.5 mm I.D, 5 μm), with a mobile phase consisting of 50 mM ammonium acetate (solvent A) and a mixture of acetonitrile/methanol (1:1 v/v) (solvent B), at a flow rate of 9 μL min-1. The temperature of the column was 20 °C and 6 μL of sample were injected. In spite of the complexity of milk samples, an effective, simple and fast sample preparation method called salting out-assisted liquid-liquid extraction (SALLE) was developed for the analysis of these compounds in cow milk samples. To obtain satisfactory extraction efficiencies for the studied analytes, several parameters affecting the SALLE procedure were optimized including the amount of sample, type and volume of the extraction solvent, and the nature and amount of the salt. Good linearity was obtained (R2 > 0.9985 for all BZs) with limits of detection (LOD) between 1.0 and 2.8 μg kg-1. Relative standard deviations of repeatability and intermediate precision were below 1.6...Continue Reading

Citations

May 3, 2020·Electrophoresis·Karen Mejía-CarmonaFernando Mauro Lanças
Apr 10, 2021·Journal of Chromatography. a·Lan ChenXue-Song Feng

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