TABLE 3.

Recovery, intra-day precision, and LLQ of the HPLC method.

	The level of probe spiked in plasma (μg/ml)	Recovery (%)	Intra-day precision (%)	LLQ (μg/ml)
Dapsone	0.16∼2.5	96.2∼98.5	2.0∼5.2	0.04
Phenacetin	0.16∼5.0	90.1∼98.5	2.7∼4.8	0.04
Chlorzoxazone	0.18∼3.0	80.5∼89.8	2.6∼8.5	0.09
Omeprazole	0.16∼2.5	92.1∼100.1	1.5∼4.6	0.08