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Automated at-column injection into narrow bore capillary GC columns

✍ Scribed by Hagman, Gunnar ;Roeraade, Johan

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 283 KB
Volume: 14
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240141010

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✦ Synopsis

Abstract

An injector designed for automatic direct liquid injection into narrow bore capillary GC columns has been constructed and evaluated. The tip of the syringe needle is aligned with, and positioned close to, the column entrance in a small, pressurized cavity: when the sample is dispensed it is immediately forced into the column by the action of the surrounding carrier gas. A standard autosampler equipped with a standard stainless steel syringe needle was utilized for at‐column sample transfer into 100 μm i.d. columns.

RSD values for n‐alkanes were between 0.1 and 0.3% for relative area counts and approximately 1% for absolute area counts.

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