Comparison of conductivity-water content curve and visual methods for ascertaintation of the critical water content of O/W microemulsions formation.
- Author:
Da-wei XIANG
1
;
Tian-tian TANG
;
Jin-fei PENG
;
Lan-lin LI
;
Xiao-bo SUN
;
Da-xiong XIANG
Author Information
1. Key Laboratory of Traditional Chinese Medicine Preparation, Hunan Province, Second Xiangya Hospital of Central South University, Changsha 410011, China.
- Publication Type:Journal Article
- MeSH:
Electric Conductivity;
Emulsions;
chemistry;
Water;
chemistry
- From:
Acta Pharmaceutica Sinica
2010;45(8):1052-1056
- CountryChina
- Language:Chinese
-
Abstract:
This study is to screen 23 blank O/W type microemulsion (ME) samples, that is 15 samples from our laboratory, and 8 samples from literature; compare the conductivity-water content curve (CWCC) method and visual method in determining the critical water content during O/W type MEs' formation, to analyze the deficiency and the feasibility of visual method and to exploxe scientific meanings of CWCC method in judging the critical water content of O/W type MEs during formation. The results show that there is a significant difference between the theoretical feasible CWCC method and visual method in determining the critical water content (P<0.001), and the results judged by conductivity is higher than that by eye-based water content. Therefore, this article firmly confirmed the shortcomings of visual method and suggested that the eye-base "critical water content" may falls into continuous ME stage during O/W MEs' formation. Further more, the CWCC method has theoretical feasibility and scientific meanings in determining the critical water content of O/W type MEs during formation.
