Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1987-12-16
1989-04-04
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
2504581, 2504591, 422 52, 436172, G01N 2176
Patent
active
048188832
ABSTRACT:
A luminometer apparatus has a light-tight box (12) into which a cuvette (2) containing a sample and a reagent are located for producing a phosphorescent reaction. The phosphorescent reaction is detected by a photodetector (PD) and a shutter (3) is interposed between the cuvette and the shutter. Output signals from the photodetector are applied to a circuit arrangement (FIG. 4) which detects the phosphorescent reaction at predetermined intervals and by subtracting the successive values of light from one another so a measured peak value of light intensity is determined. The shutter is closed and the dark current signal of the photodetector is determined and subtracted from the measured peak value. A true peak intensity of the emitted light is thus derived and the concentration of the material being assayed is calculated by raising the peak intensity to the power n where n has a value between 0 and 9 predeterminedly derived for the sample.
REFERENCES:
patent: 4438329 (1984-03-01), Ford et al.
patent: 4581922 (1986-04-01), Aiello
Zyat'kov et al., "Device for Analyzing the Spectral Composition of Weak Luminous Fluxes", Zhurnal Prikladno; Spektoskopii, 22(3), pp. 482-486, Mar. 1975.
Hazan et al., "An Improvement of Nanosecond Fluorimeters to Overcome Drift Problems", Rev. Sci. Instrum., 45(12), Dec. 1974, pp. 1602-1604.
Anderson Joseph C.
Applebaum Martin
Biolite Ltd.
Fields Carolyn E.
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