Temperature dependence of the solubility areas for W/O microemulsions with nonionic/anionic surfactants

The solubitity areas were determined at 30, 50 and 75 C for W/O microemulsions of water and decane stabilized by sodium dodecyl sulfate or hexaethylene glycol dodecyl ether in combination with pentanol. The results showed no pronounced changes when the ionic surfactant was partly replaced with the nonionic one and revealed an excellent temperature stability in the range 30–75 C for the W/O microemulsions.