AimTo study effects of PVP K30 on the aque ou s solubility and dissolution properties of daidzein. Methods To measure the aqueous solubility and dissolution rates of daidzein in three diffe rent states (within solid d...AimTo study effects of PVP K30 on the aque ou s solubility and dissolution properties of daidzein. Methods To measure the aqueous solubility and dissolution rates of daidzein in three diffe rent states (within solid dispersions, physical mixtures and as a pure drug) and investigate drug-polymer interactions in the solid state using X-ray powder d iffraction and fourier-transform infrared spectroscopy. Results The negative values of the Gibbs free energy and enthalpy of transfer explaine d the spontaneous transfer of daidzein from phosphate buffer solution (PBS) to a solution of PVP in PBS. X-ray powder diffraction patterns showed that the drug was in the amorphous state (ratio of the drug ∶ PVP<1∶5) when dispers ed i n PVP K30. The infrared spectra indicated there exist interactions between the O H of daidzein and the C=O of PVP K30. Conclusionthe dispersion of daidzein in PVP K30 considerably enhances the solubility and dissolution rat e.展开更多
目的将五仁醇制成固体分散体,提高五仁醇中有效成分的体外溶出度。方法采用直接将载体材料溶于五仁醇提取液,然后除去溶剂的方法制备了多种五仁醇固体分散体,以五味子甲素为指标成分,研究并比较了它们的表观溶解度和体外溶出度。结果配...目的将五仁醇制成固体分散体,提高五仁醇中有效成分的体外溶出度。方法采用直接将载体材料溶于五仁醇提取液,然后除去溶剂的方法制备了多种五仁醇固体分散体,以五味子甲素为指标成分,研究并比较了它们的表观溶解度和体外溶出度。结果配比为1∶3的五仁醇-聚乙烯吡咯烷酮K 30(PVP K 30)固体分散体中有效成分的表观溶解度比五仁醇胶囊内容物显著提高,达到5.06μg/mL(水);溶出介质(水)中分散(包括溶解)的小于0.22μm的药物高达43.2%。结论五仁醇-PVP K 30固体分散体能明显提高五仁醇中有效成分的表观溶解度和体外溶出度。展开更多
文摘AimTo study effects of PVP K30 on the aque ou s solubility and dissolution properties of daidzein. Methods To measure the aqueous solubility and dissolution rates of daidzein in three diffe rent states (within solid dispersions, physical mixtures and as a pure drug) and investigate drug-polymer interactions in the solid state using X-ray powder d iffraction and fourier-transform infrared spectroscopy. Results The negative values of the Gibbs free energy and enthalpy of transfer explaine d the spontaneous transfer of daidzein from phosphate buffer solution (PBS) to a solution of PVP in PBS. X-ray powder diffraction patterns showed that the drug was in the amorphous state (ratio of the drug ∶ PVP<1∶5) when dispers ed i n PVP K30. The infrared spectra indicated there exist interactions between the O H of daidzein and the C=O of PVP K30. Conclusionthe dispersion of daidzein in PVP K30 considerably enhances the solubility and dissolution rat e.
文摘目的将五仁醇制成固体分散体,提高五仁醇中有效成分的体外溶出度。方法采用直接将载体材料溶于五仁醇提取液,然后除去溶剂的方法制备了多种五仁醇固体分散体,以五味子甲素为指标成分,研究并比较了它们的表观溶解度和体外溶出度。结果配比为1∶3的五仁醇-聚乙烯吡咯烷酮K 30(PVP K 30)固体分散体中有效成分的表观溶解度比五仁醇胶囊内容物显著提高,达到5.06μg/mL(水);溶出介质(水)中分散(包括溶解)的小于0.22μm的药物高达43.2%。结论五仁醇-PVP K 30固体分散体能明显提高五仁醇中有效成分的表观溶解度和体外溶出度。