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. Author manuscript; available in PMC: 2012 Nov 15.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2011 Sep 22;879(30):3497–3506. doi: 10.1016/j.jchromb.2011.09.031

Fig. 2.

Fig. 2

Fig. 2

Fig. 2

Fig. 2

Lower limit of quantification in a) negative (top to bottom: tazobactam and dicloxacillin [IS]) and b) positive (top to bottom: dicloxacillin [IS], metronidazole, acyclovir, ampicillin, meropenem, piperacillin) ionization mode. Upper limit of quantification in c) negative (top to bottom: tazobactam and dicloxacillin [IS]) and d) positive (top to bottom: dicloxacillin [IS], metronidazole, acyclovir, ampicillin, meropenem, piperacillin) ionization mode. IS=internal standard.