×

Method of self-compensating a fiber optic chemical sensor

  • US 5,094,958 A
  • Filed: 08/30/1990
  • Issued: 03/10/1992
  • Est. Priority Date: 08/30/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of self-compensating a chemical sensor for variations in external factors when detecting oxygen, comprising:

  • forming the sensor with an indicator material of biacetyl which produces both fluorescence emissions at 450 nm and 490 nm and phosphorescence emissions at 518 nm and 570 nm, only the phosphorescence emissions of which are analyte specific;

    exciting the indicator material at 420 nm to produce fluorescence and phosphorescence peaks at said wavelengths;

    forming a ratio of a fluorescence peak intensity at 450 nm or 490 nm to a phosphorescence peak intensity at 518 nm or 570 nm;

    determining oxygen changes from the ratio.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×