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W/O emulsions can be inverted to O/W systems by adding hydrophilic emulsifier. This has been studied with the emulsifier combination rapeseed sorbitol ester (hydrophobic) and lauroyl glutamate (hydrophilic). Phase inversion occurs at a well defined amount of hydrophilic emulsifier. This critical quantity of hydrophilic emulsifier depends on the emulsion recipe, in particular the water/oil ratio. Stable...
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