Abstract
Determination was made of surface activity data such as surface tension, interfacial tension, critical micelle concentration (cmc), transmittance and viscosity of aqueous solutions of soy lysophospholipid (SLPL) prepared from soy phospholipid (SPL) by phospholipase A2. This was also done for transmittance of aqueous solutions of SLPL containing citric acid, NaCl, and CaCl2. Surface tension and interfacial tension of aqueous SLPL decreased with increase in lysophospholipid content determined by hydrolysis and cmc of SLPL determined by critical point concentration was 0.0008wt/vol%. HLB of SLPL prepared by hydrolysis (99%) of SPL was 19. Transmittance of aqueous SLPL containing 1wt/vol% citric acid, 10wt/vol% NaCl and 0.05wt/vol% CaCl2 increased with lysophospholipid content as determined by hydrolysis. Apparent viscosity of aqueous SLPL was noted to suddenly increase at 10wt/vol% concentration.
