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出 处:《中国新药杂志》2006年第15期1268-1271,共4页Chinese Journal of New Drugs
摘 要:目的:考察室温下不同pH值条件时马来酸咪达唑仑的油水分配系数以及2-羟丙基-β-环糊精对马来酸咪达唑仑的增溶作用。方法:采用了摇瓶法测定马来酸咪达唑仑的油水分配系数;用相溶解度法考察了2-羟丙基-β-环糊精对马来酸咪达唑仑的增溶作用。结果:测得的马来酸咪达唑仑的油水分配系数P分别为2.36(pH值3.5),87.40(pH值4.5),240.65(pH值5.5),506.92(pH值6.5),554.40(pH值7.5);在pH值为5.5时,2-羟丙基-β-环糊精浓度为175.39 mol·L-1时,马来酸咪达唑仑的溶解度可达11.94 g·L-1。结论:马来酸咪达唑仑的油水分配系数随pH值的增大而增大;2-羟丙基-β-环糊精对马来酸咪达唑仑有很好的增溶作用,在pH值5.5时增溶效果最好。Objective: To determine the oil-water partition coefficients of midazolam maleate and to assess the effect of 2-hydroxypropyl-β-eyelodextrin (HP-β-CD) on the solubility of midazolam maleate at variable pH values. Methods: The oil-water partition coefficients of midazolam maleate were determined using the shake-flask method at (24 ± 1 ) ℃ ; the effect of 2-hydroxypropyl-β-eyelodextrin on the solubility of midazolam maleate was assessed using a phase-solubility method. Results: The oil-water partition coefficient ofmidazolam maleate was 2.36 (pH 3.5), 87.40 (pH 4.5), 240.65 (pH 5.5), 506.92 (pH 6.5 ) and 554.40 (pH 7.5 ) , respectively. The solubility of midazolam maleate was 11.94 g·L^-1 at the HPC concentration of 175.39 mmol·L^-1 at pH 5.5. Conclusion: The oil-water partition coefficient was positively proportion to pH values. HPC as an ideal solubilizer was optimal for midazolam maleate at pH 5.5.
关 键 词:马来酸咪达唑仑 油水分配系数 2-羟丙基-Β-环糊精 相溶解度 增溶
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