Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1987-11-12
1989-12-26
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250576, 435 39, 436165, G01N 2103
Patent
active
048899925
ABSTRACT:
This invention relates to an instrument for the detection of microorganisms in a culture media by means of the measurement of the gaseous products generated during bacterial metabolism, without the need for extracting the products of metabolism from the culture vessel in order to perform the measurement. A special vial containing a gas-liquid separation system permits the measurement through the walls of the vial by determination of the infrared absorption by the gaseous contents within the vessel. While intended primarily for blood-culture testing, the method is applicable to other microbiological and physical chemistry investigations where changes in gas concentrations must be determined in a simple, convenient manner. An alternate embodiment is shown and described whereat a high concentration of gas is present and the infrared energy path is too long for accurate measurement.
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Hannaher Constantine
Howell Janice A.
Pinto Patrick J.
Roberts Ralph R.
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