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A rapid and highly sensitive liquid chromatography-tandem mass spectrometric (LC–MS/MS) method for simultaneous determination of cefoperazone sodium and sulbactam sodium in human plasma was developed. The analytes and internal standard (IS), cefuroxime sodium, were extracted from human plasma via liquid–liquid extraction with ethyl acetate and separated on a Waters Xterra C18 column within 3.5min...
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