Gas dosimeter for colorimetrically indicating the presence of amides
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United States of America Patent
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Jun 20, 1989
Grant Date -
N/A
app pub date -
Mar 3, 1987
filing date -
Mar 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gas dosimeter utilizing a colorimetric reagent for the selective determination of total amines in solution or in air is described. The reagent comprises 1,2 napthoquinone-4-sulfonic acid or a derivative thereof. Upon addition of amines, a color is formed which is quantitatively related to the number of amine molecules reacted. The reagent can be utilized to detect aromatic amines apart from primary amines by the addition of a buffering agent to maintain the pH less than 4.5.
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