Figure 9.

X-ray diffraction patterns of BSA (panel A) and mannitol (panels B and C). No clear diffraction pattern was obtained after measuring the BSA-based samples, indicating that the BSA formulation was amorphous after spin freeze-drying. The X-ray diffraction patterns of the slow (panel B) and fast (panel C) spin-frozen mannitol formulation are identical and show characteristic peaks of $\delta$-mannitol and $\beta$-mannitol polymorphs.