Chemistry: analytical and immunological testing – Oxygen containing – Inorganic carbon compounds
Patent
1992-03-31
1993-12-21
Johnston, Jill A.
Chemistry: analytical and immunological testing
Oxygen containing
Inorganic carbon compounds
128634, 356402, 356409, 356411, 385 12, 422 8206, 422 8207, 422 8208, 436 68, 436136, 436172, G01N 2164, G01N 3350
Patent
active
052720900
ABSTRACT:
A method and apparatus are described for an accurate determination of the concentration of a gas, vapor or a gas dissolved in a sample which compensate for variations in temperature and light - source intensity. The apparatus comprises a sensor containing a fluorescent reagent connected to a transfer optic, such as fiber optics prism or glas pipes, and to a reference sensor containing the same fluorescent reagent. The reference sensor is encapsulated in an environment containing air. The light emitted from the first sensor and the reference sensor is determined and recorded automatically, the concentration of the gas being calculated based on the output from said light detectors using calibration data of the fluorescent reagent present in the sensors. The reagent is immobilized in the sensor by a glue, such as a silicon glue.
REFERENCES:
patent: 4639594 (1987-01-01), Schoch et al.
patent: 4849172 (1989-07-01), Yafuso et al.
Jones, et al., Analytical Proceedings, (Jul. 1985) vol. 22, pp. 207-210.
Gavish Moshe
Roitberg Misha
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