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At-column injector for capillary GC — design and evaluation

✍ Scribed by Hagman, Gunnar ;Roeraade, Johan

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
392 KB
Volume
13
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

The present paper describes constructional details and evaluations of an at‐column injector for capillary GC. Injections were made via a sample loop on a 0.32 mm i.d. capillary column. Two rotary valves were employed to allow a wash of the sample loop and a backflush of the transfer line. Repeatability, calculated from absolute area counts for n‐alkanes was between 0.3–1% RSD, for injected sample volumes between 5 and 100 μl. Promising results were also obtained with syringe‐based injections on narrow bore (100 μ i.d.) columns. Repeatability on the basis of normalized area counts was in the order of 0.1–0.2% RSD, while solvent tailing was practically absent.

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