公开(公告)号：US6119511A

公开(公告)日：2000-09-19

申请号：US299379

申请日：1999-04-27

申请人： Sherril D. Christian ,  Andrew R. Slagle ,  Edwin E. Tucker ,  John F. Scamehorn ,  Katsuhiko Fujio

发明人： Sherril D. Christian ,  Andrew R. Slagle ,  Edwin E. Tucker ,  John F. Scamehorn ,  Katsuhiko Fujio

IPC分类号： G01N13/02

CPC分类号： G01N13/02

摘要： A method and apparatus is presented for determining surface tension of a liquid or interfacial tension between two dissimilar liquids by using a rigidly suspended probe with small sample sizes and by measuring probe force using a top-loading balance used for supporting the container of liquids under test. When a small sample size in a small container is used, capillary action between a probe and the container walls enhances the measured force, and an adjustment factor for the capillary action must be applied. A probe rigidly suspended to overcome capillary action between the probe and walls permits such measurements. For any sized sample, in accordance with Isaac Newton's third law of equal and opposite forces acting between objects, the force required for lifting a probe vertically from a liquid is equivalent to the reduction in weight of the liquid and container. Force magnitude is thus determined using a top-loading balance for observing weight change, either in the liquid while a suitably configured probe is withdrawn from the liquid or in a probe suspended by a direction converter resting on a top-loading balance while the container and liquid are lowered.

摘要翻译： 提出了一种方法和装置，用于通过使用具有小样品尺寸的刚性悬挂的探针和通过使用用于支撑待测液体的容器的顶部负载平衡来测量探针力来确定液体的表面张力或两种不同液体之间的界面张力 。 当使用小容器中的小样品尺寸时，探头和容器壁之间的毛细作用增强了测量的力，并且必须应用毛细作用的调节因子。 刚性悬挂以克服探针和墙壁之间的毛细作用的探针允许这种测量。 对于任何尺寸的样品，根据Isaac Newton在物体之间作用的相等和相反力的第三定律，从液体垂直提起探头所需的力等于液体和容器重量的减少。 因此，使用用于观察重量变化的顶部载荷平衡来确定力的大小，无论是在液体中，而适当配置的探针从液体中取出，或者在由搁置在顶部装载平衡上的方向转换器悬挂的探针中，而容器和 液体降低。