Measuring and testing – Sampler – sample handling – etc. – With heating or cooling
Patent
1981-08-10
1983-11-15
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
With heating or cooling
7386487, G01N 3108
Patent
active
044148577
ABSTRACT:
Disclosed is a method and apparatus for injecting samples into the evaporator of a gas chromatograph effected by a sample carrier, whereafter the thus formed vapors are transferred into the flow of a carrier gas. According to one aspect of the invention, the evaporator of the gas chromatograph is sealed only for a period of the sample introduction subsequent to the physical communication of the evaporator with the sample carrier. Vapors of the substance under analysis are conveyed from the evaporator into the chromatographic column via a flow constrictor of constant cross-sectional diameter.
According to another aspect of the invention the flow constrictor of constant cross-section is positioned essentially after the passageway communicating the sample carrier with the evaporator but prior to the passageway for evacuating the vapors from the evaporator to the chromatographic column. The sample carrier is provided with a sealing element for sealingly blocking the passageway communicating the sample carrier with the evaporator during sample injection.
REFERENCES:
patent: 2839152 (1958-06-01), Tracht
patent: 3247704 (1966-04-01), Konig
patent: 3566698 (1971-03-01), Sheppard
patent: 3889538 (1975-06-01), Fingerle
patent: 3985016 (1976-10-01), Haruki
Alekhin Vladimir V.
Berlin Semen S.
Brazhnikov Vadim V.
Ogurtsov Vladimir V.
Poshemansky Vladimir M.
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