Determination of 5 penicillin residues in pork by HPLC/MS/MS(trap)
Qi Lu, Engguli Powder
Abstract
Qi Lu, Engguli Powder
Abstract
A method was developed for the determination of 5 penicillin residues in pork by high performance liquid chromatography tandem mass spectrometry(HPLC/MS).The samples were extracted with 0.5% acetic acid,followed by homogenizing and centrifuging precipitation,cleaned-up with XAD-2 solid-phase extraction column, eluted by methanol.The separation was performed on a Agilent HC-C18(250 mm×4.6 mm i.d.,5 μm) column with a gradient system of 0.1% ammonia and acetonitrile as mobile phases.At spiked levels are 0.1、 0.2、 0.5 mg/kg,the limits of detection of the method are 1~5 ppb for the various antibiotics and recoveries of the spike experiment are from 52% to 82.8%,precisions are between 3.4% and 9.2%.The method is suitable for the determination of residues of penicillins in pork.
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A method was developed for the determination of 5 penicillin residues in pork by high performance liquid chromatography tandem mass spectrometry(HPLC/MS).The samples were extracted with 0.5% acetic acid,followed by homogenizing and centrifuging precipitation,cleaned-up with XAD-2 solid-phase extraction column, eluted by methanol.The separation was performed on a Agilent HC-C18(250 mm×4.6 mm i.d.,5 μm) column with a gradient system of 0.1% ammonia and acetonitrile as mobile phases.At spiked levels are 0.1、 0.2、 0.5 mg/kg,the limits of detection of the method are 1~5 ppb for the various antibiotics and recoveries of the spike experiment are from 52% to 82.8%,precisions are between 3.4% and 9.2%.The method is suitable for the determination of residues of penicillins in pork.
Key concepts: Chemistry, Chromatography, Acetic acid, Elution, High-performance liquid chromatography, Extraction (chemistry), Penicillin, Solid phase extraction