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[Study on dispersivity of baicalin solid dispersion by vibrational spectrometry].

OBJECTIVE
To study the dispersivity of baicalin solid dispersion by Raman spectrometry and infrared spectrometry in order to obtain a new and simple method in examining the dispersivity of solid dispersion.


METHOD
Baicalin solid dispersion was prepared by solvent method. The Raman spectra, infrared spectra and X-ray powder diffraction patterns of crude baicalin, PVP K30, physical mixture, solid dispersion were acquired by Raman and Fourier transform infrared spectrometers and X-ray powder diffractometry. Then the spectra were compared with each other in order to find out the differences between baicalin solid dispersion and other materials.


RESULT
The result of Raman spectrometry was that amorphous baicalin presented in the solid dispersion, which was in agreement with that of X-ray powder diffractometry.


CONCLUSION
Raman spectrometry which is fast, direct and non-destructive is an ideal method for examining the dispersivity of solid dispersion.