13. Disperse Systems (分散体系)
13. Disperse Systems (分散体系）
Contents Suspensions(混悬剂) Emulsions(乳剂) Gels and magmas(凝胶剂和乳浆剂) Proper administration and use of disperse systems(分散体系的正确给药和使用) Aerosols(气雾剂)
Contents ◼ Suspensions （混悬剂） ◼ Emulsions （乳剂） ◼ Gels and magmas （凝胶剂和乳浆剂） ◼ Proper administration and use of disperse systems （分散体系的正确给药和使用） ◼ Aerosols （气雾剂）
Liquid preparations containing undissolved or immiscible drug distributed throughout a vehicle In these preparations, the substance distributed is referred to as dispersed phase and the vehicle is termed the DDD dispersing phase or dispersion medium Together, they produce a dispersed system
◼ Liquid preparations containing undissolved or immiscible drug distributed throughout a vehicle. ◼ In these preparations, the substance distributed is referred to as dispersed phase, and the vehicle is termed the dispersing phase or dispersion medium. ◼ Together, they produce a dispersed system
The particles of the dispersed phase are vary widely in size. Dispersions containing coarse particles usually 10 to 50 um, are referred to as coarse dispersions, they include the suspensions and emulsions。 a Dispersions containing particles of smaller size are termed fine dispersions(0.5-10um). a If the particles are in the colloidal range, colloidal dispersions a Magmas and gels are fine dispersions
The particles of the dispersed phase are vary widely in size. ◼ Dispersions containing coarse particles, usually 10 to 50 m, are referred to as coarse dispersions; they include the suspensions and emulsions. ◼ Dispersions containing particles of smaller size are termed fine dispersions (0.5~10m). ◼ If the particles are in the colloidal range, colloidal dispersions. ◼ Magmas and gels are fine dispersions
Suspensions Suspensions may be defined as preparations containing finely divided drug particles distributed somewhat uniformly throughout a vehicle in which the drug exhibits a s minimum degree of solubility 混悬剂系指难溶性固体药物以微粒状态分 散于分散介质中形成的多相分散体系
Suspensions ◼ Suspensions may be defined as preparations containing finely divided drug particles distributed somewhat uniformly throughout a vehicle in which the drug exhibits a minimum degree of solubility. ◼ 混悬剂系指难溶性固体药物以微粒状态分 散于分散介质中形成的多相分散体系