PROCESS AND APPARATUS FOR PHYSICAL-CHEMICAL ANALYSIS BASED ON THE CONTROL OF INTERFACE TENSIONS

摘要

The invention relates to a method and apparatus for analyzing the behavior of a fluid / fluid interface, in particular in the presence of surfactant acifs agents. According to the invention, a sphygmomanometer operating on the principle of the hanging drop, and slaves the quantity of liquid injected in the drop on the value of the interfacial tension calculated: it increases the volume of the drop formed as and as the interfacial tension tends to decrease. so we provide for a drop forming mechanism (30); means for acquiring an image of the drop; extraction means of the contour of the drop (40); means (50) for calculating the interfacial tension from the shape and dimensions of the contour; and regulating means (60). The method uses a method for rapid measurement of interfacial tension, using all the contour points of the drop and for obtaining a value less than a second with a microcomputer.