Confirmatory assay for the simultaneous detection of five penicillins in muscle, kidney and milk using liquid chromatography-electrospray mass spectrometry.


A confirmatory assay using liquid chromatography-electrospray mass spectrometry (LC-EMS) is presented for the simultaneous determination of penicillins V and G along with oxacillin, cloxacillin and dicloxacillin in muscle, kidney and milk. Nafcillin is used as an internal standard. Samples are extracted using acetonitrile and cleaned up using liquid-liquid… (More)


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