Table 1. Chromatographic Conditions for Determining the Concentration of the Model Drugs by HPLC.

	drug combination
parameter	ATV-RTV	FDN-IPM
flow rate (mL/min)	0.75	1
UV wavelength (nm)a	240	250
mobile phase (%v/v)b	45:55	40:60

^a214 nm was used for samples from flux experiments of ATV, RTV, and FDN.

^bWater/acetonitrile.