. 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 3. Summary of standard curve, retention times, and extraction efficiency.

Compound	Range ng/mL	r²	Quadratic coefficient	SD	Slope	SD	Intercept	SD	Retention time min	Extraction efficiency %	Mean deviation %
Ampicillin	300–150,000	0.9981	-1.6842E-10	1.9132E-10	2.3660E-04	7.4519E-05	-5.4400E-02	1.7704E-02	1.76	97.33	0.10
Piperacillin	300–150,000	0.9984	-1.3646E-09	5.2397E-10	7.2780E-04	1.9669E-04	-8.1600E-02	1.5208E-02	2.32	97.66	0.03
Tazobactam	150–75,000	0.9986	-4.3600E-10	5.4385E-11	1.5160E-04	2.0748E-05	-4.1740E-04	2.5241E-03	2.61	94.66	0.20
Meropenem	100–50,000	0.9974	-4.8644E-11	1.4345E-10	1.7510E-04	5.3558E-05	-3.0180E-02	8.3174E-03	1.72	77.33	0.70
Acyclovir	100–50,000	0.9966	-5.4780E-10	2.7185E-10	3.3120E-04	5.7160E-05	-1.8948E-02	1.4136E-02	1.59	83.00	1.40
Metronidazole	50–25,000	0.9972	-1.5890E-09	2.3465E-09	6.9140E-04	6.6114E-04	-1.4320E-02	1.7062E-02	1.77	97.66	0.10
Dicloxacillin(IS)									2.82	92.24

IS=internal standard; SD=standard deviation.