Abstract
Penicillins and some non-penicillin β-lactams may cause potentially life-threatening allergic reactions. Thus, possible cross contamination of β-lactams in food or drugs can put people at risk. Therefore, when there is a reasonable possibility that a non-penicillin product could be contaminated by penicillin, the drug products are tested for penicillin contamination. Here, a sensitive and rapid method for simultaneous determination of multiple β-lactam antibiotics using high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed and validated. Mass spectral acquisition was performed on a Q-Exactive HF mass spectrometer in positive ion mode with parallel reaction monitoring (PRM). The method was validated for seven β-lactam antibiotics including one or two from each class and a synthetic intermediate. The quantification precision and accuracy at 200 ppb were in the range of ± 1.84 to ± 4.56 and - 5.20 to 3.44%, respectively. The limit of detection (LOD) was 0.2 ppb, and the limit of quantitation (LOQ) was 2 ppb with a linear dynamic range (LDR) of 2-2000 ppb for all eight β-lactams. From various drug products, the recoveries of eight β-lactams at 200 and 2 ppb ranged from 93.8 ± 3.2 to 112.1 ± 4.2% a...Continue Reading
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