. 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

Table 2. Optimal precursor and product ions and instrument parameters by compound.

	Molecular weight (g/mol)	Ionization mode	Precursor ion	Product ion	Collision gas	Collision energy (eV)
Ampicillin	349.40	Positive	350.1	160.1	10	20
Piperacillin	517.55	Positive	518.2	143.2	10	25
Tazobactam	300.29	Negative	299.0	137.9	10	-20
Meropenem	383.46	Positive	384.1	141.1	10	25
Acyclovir	225.20	Positive	226.1	152.1	10	18
Metronidazole	171.153	Positive	172.1	128.1	10	20
Dicloxacillin (IS)	470.32	Positive	470.1	160.1	10	20
Dicloxacillin (IS)	470.32	Negative	468.0	326.8	10	-20

IS=internal standard.