The temperature (more precisely, narrow temperature range) above which the @[email protected] of a @[email protected] rises sharply. At this temperature the @[email protected] of the surfactant becomes equal to the @[email protected] It is best determined by locating the abrupt change in slope of a graph of the logarithm of the @[email protected] against \(t\) or \(\frac{1}{T}\).
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 613 [Terms] [Paper]