首页>
外国专利>
Method and apparatus for determining permeation behavior of foreign molecules through solids
Method and apparatus for determining permeation behavior of foreign molecules through solids
展开▼
机译:测定外来分子通过固体的渗透行为的方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
Methods and apparatus for determining the permeation behavior of foreign fluid molecules into solids whereby the results are typically obtained in less than one day. In a principal embodiment, information about the relationship between the saturation concentration and the diffusion constant of the solid is obtained by subjecting a first, thick, sample of the solid to the foreign fluid substance, which has been radioactively-tagged with a class C isotope, for a short diffusion time interval. The penetrated foreign substance is then washed out of the thick sample with an untagged solvent and the resulting solution is then analyzed to determine the quantity of the foreign substance that has diffused into the thick sample for the diffusion time. A second, thin, sample of the solid is prepared, and analyzed in a series of steps analogous to the thick, sample, whereby information concerning the saturation concentration, individually, is obtained. The above results are then used to determine the diffusion flow rate of the fluid substance through the solid. An alternative method determines the permeation behavior of a two-layer solid where each layer has a different solubility. The alternate embodiment provides for an apparatus to isolate an exposed surface of the second thicker layer so that diffusion parameters of the second thicker layer may be determined independently of the first layer.
展开▼