Patent ID: 8549897

Claim:
A system for screening a liquid composition, the system comprising: (a) a test cell having a top portion and a bottom portion, the test cell comprising (i) a test panel removably mounted to the top portion of the test cell at an angle of between about 10 to about 45 degrees to the horizontal of the test cell; (ii) a reservoir for holding the liquid composition; and (iii) a means for applying a substantially uniform coating of the liquid composition from the reservoir to at least a portion of the test panel; (b) a means for heating the test panel according to a first temperature control program; (c) a means for heating the reservoir according to a second temperature control program; and (d) a means for supplying an oxidizing gas to the test cell; wherein the means for supplying the oxidizing gas comprises an apparatus for determining a rheological property of the liquid composition, the apparatus comprising a capillary having a first end and a second end with a substantially uniform diameter over a predetermined length; the first end disposed for fluid communication with the liquid composition to be measured, the second end attached to a manifold having at least one selectable valve, the capillary together with the manifold and the at least one selectable valve define a chamber of predetermined volume, a regulated pressure source initially applied to induce the sample into the capillary and generate a differential pressure in the chamber, a pressure sensor attached to the chamber for outputting differential pressure to a computing device, and a second pressure source coupled to the at least one selectable valve for evacuating the sample from the capillary and supplying the oxidizing gas to the reservoir.