Chemistry: physical processes – Physical processes – Crystallization
Patent
1980-10-24
1981-12-15
Serwin, Ronald
Chemistry: physical processes
Physical processes
Crystallization
356434, 356246, 364498, 422 64, 422 67, G01N 3504, G01N 2103, G01N 2113
Patent
active
043057233
ABSTRACT:
The characteristics of a sample body fluid are determined in a chemical analyzer by sensing the transmittance of light by the sample fluid and reagents during a reaction period. A beam of light is directed onto a cuvette containing the sample body fluid and reagent. A portion of the light is absorbed by the cuvette, the sample fluid and reagent. The remainder of the light is transmitted to a sensor which provides an analog electrical transmittance signal proportional thereto. The analog signal is logarithmically amplified, and is applied to a peak detector. A structure adjacent the cuvette provides a strobe signal such that the analog signal always has a peak amplitude during the strobe signal. The peak detector senses the peak amplitude of the analog signal during the strobe signal and the peak amplitude is converted to a digital value representing absorbance.
REFERENCES:
patent: 3748044 (1973-07-01), Liston
patent: 4234538 (1980-11-01), Ginsberg et al.
patent: 4234539 (1980-11-01), Ginsberg et al.
patent: 4234540 (1980-11-01), Ginsberg et al.
Kolber Steven N.
Rodriquez Rodolfo R.
Coulter Electronics Inc.
Serwin Ronald
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