反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
PROCEDURE
实验过程
PLGA polymer (MW 24,000, 180 mg) was dissolved in EtOAc (1800 μL). Oxytocin acetate (40 mg) was dissolved in MeOH (200 μL) and added to the polymer solution yielding a milky suspension as the organic phase. The resulting organic phase was combined with a 1% PVA aqueous phase containing 10 mM disodium pamoate to provide an emulsion. The emulsion was collected directly into a 0.3% PVA solvent extraction solution (150 mL) and stirred for four hours to extract EtOAc. Hardened microparticles were collected by filtration, washed with water, air dried and stored at 4° C. This provided formulation BM (158 mg, 79.0% yield) with a median particle size 144 μm. The core load (8.9%), encapsulation efficiency (44.5%) and in vitro burst (21.1%) were determined by RP-HPLC assay.
WORKUP
后处理
- additionadded to the polymer solution
- customyielding a milky suspension as the organic phase
- customto provide an emulsion
- customThe emulsion was collected directly into a 0.3% PVA solvent extraction solution (150 mL)
- extractionto extract EtOAc
- filtrationHardened microparticles were collected by filtration
- washwashed with water, air
- customdried
- customstored at 4° C