动态光散射技术在静脉注射亚微乳剂粒径评价中的应用

Application of dynamic light scattering on the evaluation of the particles size and distribution of submicroemulsion for injection

目的用动态光散射技术分析粒径大小及分布,为静脉注射乳剂的制备提供指导。方法制备3种不同的维生素E烟酸酯静脉注射亚微乳剂(Ⅰ,Ⅱ和Ⅲ),用Nicomp–380激光粒度测定仪分别测定3种制剂的光子相关光谱,并用离心法测定乳剂的稳定常数(KE)。结果 3种制剂的光子相关光谱有显著差别。制剂Ⅰ的Nicomp多波形分布图为双峰,制剂Ⅱ和Ⅲ的Nicomp多波形分布图为单峰,但制剂Ⅲ的Gaussian粒径分布图比制剂Ⅱ的Gaussian粒径分布图明显窄,且PSDI,PSDV和PSDN重合性很好。得到3个不同的KE值,分别为0.72,0.64,0.51。结论用Nicomp多波形分布图和Gaussian粒径分布图可以指导制剂的制备。

Objective To direct the preparation of submicroemulsion for injection, with the technology of dynamic light scattering being widely used to analyze the size and distribution of particles. Methods Three kinds of α–tocopherol nicotinate(TN) submicroemulsion were prepared. Their dynamic light scattering data were measured by Nicomp–380 laser particle sizing systems and stability constants(KE) were measured by centrifugation method. Results There were significant dissimilarities in the data of three emulsions.Preparation Ⅰ had two peak values in Nicomp chart, however, preparation Ⅱ and Ⅲ had single peak value. The range of distribution of preparation Ⅲ, with nearly same PSDI, PSDV and PSDN, was much narrower than that of preparation Ⅱ. The values of KE of three emulsions were 0.72, 0.64 and 0.51, respectively. Conclusions Nicomp chart and Gaussian chart can direct the preparation of submicroemulsion.