Patents Assigned to Life Science Laboratories, Inc.
  • Method for determining glycol and formaldehyde contaminants in ground water samples
    Patent number: 5801300
    Abstract: A method for the qualitative determination of the visible levels of glycol and/or formaldehyde at significant concentrations greater than 10 ppm (10 ppm-10,000 ppm range) in a water sample, in which the sample is treated first with periodic acid, then with iodide-thiosulfate and finally with acetyl acetone to yield a yellow color without the benefit of heat. This yellow color is visible to the naked eye and proportional to the amount of contaminants ethylene glycol, propylene glycol and/or formaldehyde present in the original water sample.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: September 1, 1998
    Assignee: Life Science Laboratories, Inc.
    Inventors: Joseph L. Jeraci, David Prichard