Chromogenic solution for immunoassay
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United States of America Patent
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Apr 25, 1989
Issued Date -
N/A
app pub date -
Nov 9, 1987
filing date -
Apr 8, 1985
priority date (Note) -
Expired
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Abstract
A chromogenic solution for enzyme immunoassay. A stabilizing agent is added to chromogenic solutions containing chromogen of the hydrogen donor type. The stabilizing agent is an alkylhydroxylamine, preferably N,N-diethylhydroxylamine. The N-N diethylhydroxylamine retards degradation of the solution of the chromogen in solvent and is particularly effective in retarding discoloration of a chromogen-solvent solution placed in storage over an extended period of time. The alkylhydroxylamine preferably in the form of N,N-diethylhydroxylamine has the additional property that it does not adversely affect the activity of enzymes employed in enzyme immunoassays. It also does not interfere with binding specificity or reactivity of antibodies.
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