Composition and method of assaying liquids for specific gravity

Details Composition and method of assaying liquids for specific gravity Composition and method of assaying liquids for specific gravity

G - Physics

01

N

150/14, 150/3

G01N 33/52 (2006.01) G01N 31/22 (2006.01) G01N 33/487 (2006.01) G01N 33/493 (2006.01)

Patent

CA 1338588

A new and improved composition and method of determining the specific gravity of an aqueous test sample. The method includes using a test device comprising a carrier matrix incor- porating a reagent composition capable of inter- acting with an aqueous test sample to produce a visually or instrumentally detectable and measur- able response that correlates to the specific gravity of the aqueous test sample. The new and improved reagent composition, comprising a molyb- date-dye complex indicator, such as a molybdate- pyrocatechol violet complex; a protein, such as albumin; a chelating agent, like tartaric acid; and, if necessary, a suitable buffer, is incor- porated into a carrier matrix, like filter paper, to provide increased sensitivity to test sample specific gravity and improved color differentia- tion between test samples having different speci- fic gravities, thereby affording a more accurate and trustworthy specific gravity assay of an aqueous test sample, such as urine.

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