松萝酸自微乳的处方优化及质量评价
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篇名: | 松萝酸自微乳的处方优化及质量评价 |
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摘要: | 目的:制备松萝酸自微乳,优化其处方,评价其质量。方法:采用乳化法,以中链甘油三酯-单亚油酸甘油酯(1 ∶ 1,m/m)为油相,聚氧乙烯氢化蓖麻油为乳化剂,二乙二醇单乙基醚为助乳化剂,制备松萝酸自微乳。在溶解度试验和伪三元相图的基础上,以自乳化时间(t)、透光率(T)、药物平衡溶解度(S)、5 min和60 min时药物的累积溶出度(Q5 min、Q60 min)作为评价指标,采用星点设计-响应面法优化微乳处方中油相占比和乳化剂-助乳化剂质量比(Km)。同时对最优处方进行验证试验,并对其形态、粒径、载药量、溶出度等进行考察。结果:最优处方中油相占比为25%、Km为2.0,即处方中混合油相、乳化剂、助乳化剂的质量比分别为25%、50%、25%;最优处方所制松萝酸自微乳的t、T、S、Q5 min、Q60 min分别为1.96 min、87.67%、5.67 mg/g、66.58%、76.73%(RSD均小于3%,n=3),与预测值的相对误差均小于4%(n=3)。松萝酸自微乳经水稀释后为球形乳滴,乳化后平均粒径为39.4 nm,平均载药量为4.55 mg/g,在pH 6.8磷酸盐缓冲液中Q90 min为99.58%(n=3)。结论:所制松萝酸自微乳的质量符合相关要求。 |
ABSTRACT: | OBJECTIVE: To prepare Usnic acid self-microemulsion, prescription optimization and evaluate its quality. METHODS: Usnic acid self-microemulsion was prepared by emulsification method using medium chain triglycerides-single linoleic acid glyceride (1 ∶ 1, m/m) as oil phase, polyoxyethylene hydrogenated castor oil as emulsifier, diethylene glycol monoethyl ether as co-emulsifier. Based on the solubility test and pseudotemary phase diagram, using self-emulsifying time (t), light transmittance (T), drug equilibrium solubility (S), accumulative dissolution rate at 5 min and 60 min (Q5 min, Q60 min) as evaluation indexes, central composite design-response surface methodology was utilized to optimize oil phase ratio and ratio of emulsifier to co-emulsifier (Km) in microemulsion formulation. At the same time, the optimal formulation was verified, the morphology, particle size, drug-loading amount and dissolution of Usnic acid self-microemulsion were investigated. RESULTS: The optimal formulation was as follows as oil phase ratio of 25%, Km of 2.0; ratio of mixed oil phase, emulsifier, co-emulsifier in the formulation was 25%, 50%, 25%. t, T, S, Q5 min and Q60 min of Usnic acid self-microemulsion prepared by optimal formulation were 1.96 min, 87.67%, 5.67 mg/g, 66.58%, 76.73% (all RSD<3%, n=3), respectively. The relative errors of them to predicted values were all less than 4% (n=3). Usnic acid self-microemulsion was spherical droplet in shape after diluted with water. The average particle size was 39.4 nm, average drug-loading amount was 4.55 mg/g. Q90 min of Usnic acid self-microemulsion reached 99.58% in pH 6.8 phosphate buffer (n=3). CONCLUSIONS: Prepared Usnic acid self-microemulsion is in line with quality requirements. |
期刊: | 2018年第29卷第3期 |
作者: | 赵颖,宋婷,屈梦华,宋丹,胥秀英 |
AUTHORS: | ZHAO Ying,SONG Ting,QU Menghua,SONG Dan,XU Xiuying |
关键字: | 松萝酸;自微乳;伪三元相图;星点设计-响应面法;质量评价 |
KEYWORDS: | Usnic acid;Self-microemulsion; Pseudotemary phase diagram; Central composite design-response surface methodology; Quality evaluation |
阅读数: | 360 次 |
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