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Spray-dried dispersion with 70% DL ritonavir. (a) X-ray powder diffraction at reflector mode 3°–50° 2θ (deg), scan speed 10° 2θ (deg)min, step size 0.02θ (deg). Acceleration voltage 45 kV and 15 mA current. (b) Mini dissolution of 1 mg/mL API in FaSSIF (20 mg RIT). Drug concentration is measured using RP-HPLC at 215 nm.
