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The objective of this work was to study the effect of the concentration of a non-ionic surfactant in water on the interfacial tension of an alkane series. For this purpose Triton X-100 and the alkanes: hexane, heptane, octane, decane, undecane and dodecane were selected for analysis. The tests were done at concentrations of 10 –3 , 10 –4 and 10 –5 mol/L and the emergent drop model was employed for the calculation of the interfacial tension. In this work it was observed that the interfacial tension of the Triton X-100 solutions in water decreased as the concentration of the surfactant increase. It was concluded that the interfacial tension value is a function of the concentration, the exposure time of the interface with the dissolution and the initial volume of the drop at the moment when the measurement starts.

Estudio Experimental de la Tensión Interfacial Transitoria para Sistemas Alcanos-Agua-Triton X-100 empleando la Técnica de la Gota Emergente