Patent ID: 7754488
Filing Date: 2010-07-13
Classification: G01N

Abstract:
1. A method to analyze the condition of a functional fluid comprising: (1) obtaining a sample of the functional fluid, (2) placing the sample of the functional fluid on a test medium wherein the test medium comprises polymeric fibers, (3) reacting the functional fluid with an indicator in the test medium, and (4) analyzing visually the results of the reaction, resulting in the determination of the condition of the functional fluid; wherein the functional fluid is selected from the group consisting of transmission fluids, hydraulic fluids, transformer fluids, diesel, biofuels, and mixtures thereof; wherein the test medium has a property selected from the group consisting of a porosity, a density, a wicking ability and combinations thereof to provide rapid dispersion on the functional fluid; and; wherein the indicator is selected from the group consisting of Neutral Red, Safranine T or O, Indigo Carmine, Methylene Blue, Thionin, Thymolindophenol, 2,6-Dichlorophenolindophenol, Gallocyanine, Nile Blue, Variamine Blue, Diphenyl amine, Diphenylamine-4-sulfonic acid, barium salt, Tris(2,2dipyridyl)iron (II) sulfate, N-phenylanthranilic acid, Ferroin, Nitroferroin, 5,6-Dimethylferroin, 4-Amino-4′-methyldiphenylamine, Diphenylbenzindinedisulfonic acid, o-Dianisidine, 3,3′-Dimethylnaphthidine, 3,3′-Dimethylnaphthidine disulfonic acid and combinations thereof.