| 摘要 |
<p>A method for the measurement of the surface tension of biological fluids, especially for the determination of the maximum and minimum surface tension of biological fluids having aqueous phase, during which the maximum surface tension of the test fluid is measured, then the fluid is periodically moved, after which the minimum surface tension is measured. In the sense of the invention a capillary tube is inserted in the fluid tank containing the standard fluid having a known surface tension, the capillary is fixed at an angle of 0 < α « ∏/2 in relation to the plane of the surface of the standard fluid in the fluid tank, a scale is made on the basis of the known surface tension of the standard fluid in such a manner that the height identical with the fluid level formed in the capillary the value of the surface tension, while at the plane of the fluid surface in the fluid tank the 0 point of the scale are marked, after which the test fluid is poured over from the fluid tank into a capillary of the same volume, the capillary is set to the fluid level in the fluid tank at the α angle given above; the fluid is pulsated in the capillary and both before and after pulsation the values of the surface tension are read off the scale.</p> |
