葛根素聚合物胶束的制备及包封率的测定
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篇名: | 葛根素聚合物胶束的制备及包封率的测定 |
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摘要: | 目的:制备葛根素聚合物胶束并建立其包封率测定方法。方法:采用薄膜分散法制备葛根素聚合物胶束;以离心-微孔滤膜法分离胶束和游离药物,采用高效液相色谱法测定聚合物胶束包封率,色谱柱为 Diamonsil C18(2),流动相为1%柠檬酸溶液-甲醇(65 ∶ 35),流速为1 ml/min,检测波长为250 nm,柱温为室温。结果:制备的聚合物胶束形态为规则的球形或类球形,平均粒径为54.12 nm,多分散系数为0.122,Zeta电位为-13.60 mV;葛根素检测质量浓度线性范围为2~10 μg/ml(R2=0.999 4),方法回收率平均值为99.2%(RSD=0.9%,n=3),游离药物回收率为95.3%(RSD=1.7%,n=3);葛根素胶束平均包封率为(35.5±2.12)%、载药量为(0.3±0.07)%(n=3)。结论:薄膜分散法适用于制备葛根素聚合物胶束;所建立的葛根素含量及其包封率测定方法操作简单、准确、可靠。 |
ABSTRACT: | OBJECTIVE: To prepare Puerarin polymeric micelles and establish a method to determine its entrapment efficiency. METHODS: Puerarin polymeric micelles were prepared by film dispersion method. The polymeric micelles and free drug were separated by centrifugal-millipore filter filtration method. The entrapment efficiency of puerarin polymeric micelles was determined by HPLC. Diamonsil C18(2) column was used with 1% citric acid solution-methanol (65 ∶ 35) at the flow rate of 1 ml/min. The detection wavelength was set at 250 nm, and column temperature was room temperature. RESULTS: The prepared polymeric micelles were spherical and spherical-like in shape with a mean particle size of 54.12 nm, polydispersity index of 0.122, Zeta potential of -13.60 mV; the linear range of puerarin was 2-10 μg/ml (R2=0.999 4) with average recovery rate of 99.2% (RSD=0.9%, n=3). The recovery rate of free drug was 95.3% (RSD=1.7%, n=3). The mean entrapment efficiency and drug-loading amount of puerarin were(35.5±2.12)% and (0.3±0.07)%, respectively (n=3). CONCLUSIONS: Film dispersion method is suitable for the preparation of Puerarin polymeric micelles. Established method is convenient, accurate and reliable for the content and entrapment efficiency determination of Puerarin polymeric micelles. |
期刊: | 2016年第27卷第22期 |
作者: | 马晓星,韩翠艳,刘畅,朱丹,隋小宇,袁橙,黄海涛 |
AUTHORS: | MA Xiaoxing,HAN Cuiyan,LIU Chang,ZHU Dan,SUI Xiaoyu,YUAN Cheng,HUANG Haitao |
关键字: | 葛根素聚合物胶束;薄膜分散法;高效液相色谱法;离心-微孔滤膜法;包封率 |
KEYWORDS: | Puerarin polymeric micelles; Film dispersion method; HPLC; Centrifugal-millipore filter filtration method; Entrapment efficiency |
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