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Method and apparatus for analyzing acetone in breath

  • US 10,352,940 B2
  • Filed: 12/01/2016
  • Issued: 07/16/2019
  • Est. Priority Date: 05/15/2012
  • Status: Active Grant
First Claim
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1. A method for sensing acetone in breath, the method comprising:

  • providing a cartridge comprising;

    a reactant in a reaction zone, wherein the reactant comprises an amine disposed on a solid surface, anda nitroprusside in a reaction zone, the nitroprusside disposed on a solid surface,wherein the reaction zone has an optical characteristic that is at a reference level;

    causing a breath sample to be passed through the cartridge such that the acetone in the breath sample reacts with the reactant to form a reaction product, wherein the reaction product is configured to react with the nitroprusside,resulting in a change in the optical characteristic of the reaction zone relative to the reference level; and

    measuring the change in the optical characteristic of the reaction zone, said change reflective of a concentration of acetone in the breath sample.

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