Fig. 5From: Simultaneous determination of colistin sulfate and tigecycline in human plasma by liquid chromatography-tandem mass spectrometry methodMRM chromatograms for blank plasma with LOQ levels of colistin sulfate, tigecycline, and internal standard (A polymyxin E1; B polymyxin E2; C, tigecycline; D, polymyxin B1)Back to article page