Patents Assigned to Perfect View, Inc.
  • Gas dosimeter for colorimetrically indicating the presence of amides
    Patent number: 4840919
    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.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: June 20, 1989
    Assignee: Perfect View, Inc.
    Inventor: Amir J. Attar