G - Physics – 01 – N
Patent
G - Physics
01
N
150/3, 150/9
G01N 33/68 (2006.01) G01N 33/52 (2006.01)
Patent
CA 1337752
A new and improved test device and method of determining the presence and concentra- tion of proteins, such as albumin or Bence Jones proteins, in a test sample. The test device in- cludes a carrier matrix incorporating a reactant system capable of interacting with proteins to produce a visually or instrumentally detectable and/or measurable response. The carrier matrix of the device can include commonly used bibulous matrices, such as filter paper, or a new and improved nonbibulous protein-permeable strip, membrane or layer of a polymerized urethane- containing composition. In addition, a new and improved reactant system, comprising a dual indi- cator reagent system, such as bromophenol blue, methyl orange and, if necessary, a suitable buf- fer, is incorporated into the carrier matrix to provide improved color resolution and increased sensitivity to proteins, thereby affording a more accurate and trustworthy protein assay of test samples, such as urine. Furthermore, by incorporating the dual indicator reagent system into a carrier matrix comprising a polymerized urethane-containing composition, a dry phase assay for low molecular weight proteins, such as Bence Jones proteins, can be performed on a liquid test sample.
606748
Miles Inc.
Osler Hoskin & Harcourt Llp
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