G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/78 (2006.01) G01N 31/22 (2006.01) G01N 33/52 (2006.01)
Patent
CA 2376344
A simple assay is described to determine the presence of a point of interest of an aldehyde such as OPA, glutaraldehyde or formaldehyde in a test solution such as a disinfectant. The aldehyde is reacted with a calculated amount of a reagent such as sodium bisulfite or sodium cyanide. This reaction produces a solution with a first color. This first color may be colorless. The remaining aldehyde is reacted with a compound containing an amino group such as an amino acid to produce a second color. The observation of a color confirms the presence of a certain amount of the aldehyde in the test solution. If no color is developed, then the aldehyde concentration is below a certain specification. The specific concentration point may be adjusted to practically any point by adjusting the amounts of the chemical reagents used or by using a different amount of aldehyde in the solution to be tested.
Lin Szu-Min
Zhu Peter
Ethicon Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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