Sample introduction system

Details Sample introduction system Sample introduction system

1978-10-30

1980-10-07

Swisher, S. Clement

Measuring and testing

Measuring vessel

G01N 128

Patent

active

042261198

ABSTRACT:
A sample introduction system for a gas chromatograph having a chamber containing a needle for piercing a sample held in a holder and introduced into the chamber via a lock. The needle has a conical point into which a passageway opens perpendicular thereto, the passageway communicating directly with a separating column connected to the chamber. The needle is so shaped that as the sample is pushed onto the point over the entrance to the passageway the sample is sealed against the conical surface and on further penetration of the needle a gap is formed between the needle and the sample to allow ingress of a carrier gas supplied to the chamber.

REFERENCES:
patent: 2841005 (1958-07-01), Coggeshall
patent: 3672227 (1972-06-01), Frank
patent: 3783694 (1974-01-01), Otte et al.

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