Chemistry: analytical and immunological testing – Oxygen containing – Molecular oxygen
Patent
1988-12-14
1991-08-27
Hill, Jr., Robert J.
Chemistry: analytical and immunological testing
Oxygen containing
Molecular oxygen
128634, 25022714, 2504591, 2504831, 422 56, 422 57, 422 8207, 422 8208, 422 8211, 436138, 436172, 436178, G01N 2164
Patent
active
050432869
ABSTRACT:
Methods of and luminescent substances for measuring oxygen concentration of a test fluid. A test fluid is contacted with a plastic film containing a luminescent substance, the luminescent emission intensity of which is quenched in the presence of oxygen. The film is subjected to irradiation by light that is strongly absorbed by the luminescent substance, and a measure of the time dependence of luminescent emission intensity I(t) is obtained. Three modes of measuring quenching, and thus the oxygen concentration, from I(t) are described. These modes are insensitive to variation in plastic thickness, concentration of the luminescent substance, and take into account the non-exponential decay of the emission, thereby extending the range over which the film is sensitive. The luminescent substances include metallo derivatives of partially or fully fluorinated porphyrins which are photostable due to the fluorination of the porphyrin ring.
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Gouterman Martin P.
Green Edmond
Khalil Gamal-Eddin
Abbott Laboratories
Hill Jr. Robert J.
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