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[Study on preparation technology of limonene dropping pills].

OBJECTIVE
To study the technical preparation of limonene dropping pills.


METHODS
Orthogonal test was applied to optimize the preparation of limonene dropping pills.


RESULTS
The optimized project was as follow: the matrix contained PEG4000: PEG6000 (1:1.5); the refrigerant was liquid paraffin; the rate of limonene to matrix was 1:6 and the temperature of limonene was 70 degrees C; the internal and external diameter of burette was 2.0 mm and 2.4 mm, respectively; the burette was 4cm above the surface of refrigerant; drug was dropped into refrigerant of 15 degrees C at 45 drops per minute.


CONCLUSION
The results provide the data for the ascertainment of shaping operation of limonene dropping pills at the manufacturing scale.