Process and device for split and splitless sampling onto capilla

Details Process and device for split and splitless sampling onto capilla Process and device for split and splitless sampling onto capilla

1988-09-13

1990-01-23

Raevis, Robert R.

Measuring and testing

Sampler, sample handling, etc.

Analyzer supplier

7386311, G01N 100

Patent

active

048950327

ABSTRACT:
In the split sampling gas chromatographic process for analyzing a sample by introducing the needle of a syringe into the vaporization chamber of a gas chromatographic column, discharging a liquid sample from the syringe needle into the vaporization chamber, and passing the vapors of the sample through a chromatographic column along with a carrier gas, the improvement which comprises passing a cooling gas over the entire length of the syringe needle, thereby to cool the sample passing therethrough. The cooling may be effected by a flow of liquid or gaseous CO.sub.2, air or nitrogen through a tube which surrounds the needle over its length during introduction of the sample.

REFERENCES:
patent: 3401565 (1968-09-01), Stoll et al.
patent: 3482450 (1969-12-01), Harris, Jr. et al.
patent: 3798973 (1974-03-01), Estey
patent: 4269608 (1981-05-01), Sisti et al.
patent: 4289029 (1981-09-01), Sampson et al.
patent: 4300393 (1981-11-01), Stearns
patent: 4357836 (1982-11-01), Kokesh
patent: 4422860 (1983-12-01), Feinstein

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