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JA0033 Rapid analysis of aminoglycoside antibiotics in bovine tissues using disposable pipette extraction and ultrahigh performance liquid chromatography–tandem mass spectrometry
来源:Journal of Chromatography A | 作者:Steven J. Lehotay | 发布时间: 2132天前 | 2263 次浏览 | 分享到:
A high-throughput qualitative screening and identification method for 9 aminoglycosides of regulatory interest has been developed, validated, and implemented for bovine kidney, liver, and muscle tissues. The method involves extraction at previously validated conditions, cleanup using disposable pipette extraction, and analysis by a 3 min ultrahigh-performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS)method. The drug analytes include neomycin, streptomycin, dihydrosptreptomycin, and spectinomycin, which have residue tolerances in bovine in the US, and kanamicin, gentamicin, apramycin, amikacin, and hygromycin, which do not have US tolerances established in bovine tissues. Tobramycin was used as an internal standard. An additional drug, paromomycin also was validated in the method, but it was dropped during implementation due to conversion of neomycin into paromomycin. Proposed fragmentation patterns for the monitored ions of each analyte were elucidated with the aid of high resolution MS using a quadrupole-time-of-flight instrument. Recoveries from spiking experiments at regulatory levels of concern showed that all analytes averaged 70–120% recoveries in all tissues, except hygromycin averaged 61% recovery. Lowest calibrated levels were as low as 0.005 g/g in matrix extracts, which approximately corresponded to the limit of detection for screening purposes. Drug identifications at levels
1 Introduction

The monitoring of veterinary drug residues in animal-derived foods is routinely conducted in many countries to help ensure food safety and the compliance of approved veterinary medical practices. Microbial resistance to antibiotics also is a notable topic of scientific investigation and regulatory interest [1]. The analytical The monitoring of veterinary drug residues in animal-derived foods is routinely conducted in many countries to help ensure food safety and the compliance of approved veterinary medical practices. Microbial resistance to antibiotics also is a notable topic of scientific investigation and regulatory interest [1]. The analytical .....



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