RESUMEN
OBJECTIVE:To provide references for the further study of myrrha.METHODS:The chemical components of myrrha extractives exteracted by super-borderline CO 2 extraction method,soxhlet extraction method,supersound extraction method and water vapor distillation method were analyzed comparatively by GC-MS.RESULTS:The components of extrac?tives extracted by different ways were very different,with more chemical compositions and more varieties in the super-bor?derline CO 2 extractives-there were great amount of resin besides volatile oil;high temperature and organic solvents residual could be avoided in the extracting process by super-borderline CO 2 extraction method.CONCLUSION:Super-borderline CO 2 extraction method was initially assessed to be a suitable extraction method of myrrha.
RESUMEN
OBJECTIVE:To evaluate and compare the current preparation methods for pseudo-ternary phase diagrams of pharmaceutical microemulsions.METHODS:Pseudo-ternary phase diagrams were prepared by using Tween-80,OP and lecithin as emulsifiers respectively,alcohol as assistant emulsifiers,isopropyl myristate or aethylis oleas as the oil phase,the difference in phase diagrams obtained with different preparation methods was compared with regard to the accuracy and au-thenticity of valid point.RESULTS:To O/W surfactant,difference in the area of phase diagrams was small,but the dis-tinction of accuracy and authenticity of valid point was great.To W/O surfactant,difference in the area of phase diagrams was great.CONCLUSION:It is recommended to select the preparation method according to the characteristics of the constituents and the types of microemulsions in order to establish accurate and dependable phase diagram,the end point of titration should be judged comprehensively.