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A simple on-column injector for capillary gas chromatography

✍ Scribed by Lennart Okla; Clas Wesén

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
231 KB
Volume
299
Category
Article
ISSN
1873-3778

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✦ Synopsis

Capillary columns are widely used in gas chromatography (GC) because of their high resolving capacity. Split, splitless and on-column techniques are used to introduce the sample.

A conventional vaporizing GC injector can easily be converted into a split/ splitless injector. However, it cannot be used for on-column injection, which is regarded as the best injection technique for quantitation of sample components with a wide boiling point range'. In addition thermolabile compounds are less susceptible to degradation at the low injection temperatures normally encountered with on-column injection2.

More-and less sophisticated on-column injectors have been reported2-'j and some are commercially available. Although the principles of on-column injection are relatively simple, the design of the injectors is often complicated and they are expensive. This has led us to design an easily built, low-cost on-column injector, based on the principle of maintaining constant pressure at the column head during injection3.

📜 SIMILAR VOLUMES

Direct injection on capillary columns fo
Direct injection on capillary columns for gas chromatography
✍ Chauhan, J. ;Darbre, A. 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 417 KB

## Abstract Discrimination may occur when injecting samples onto gas chromatography capillary columns, whereby peak areas for higher boiling point compounds are smaller than they should be compared to lower boiling compounds. This problem is most important in quantitative work on solutes having a w

Special cooling system for the on-column
Special cooling system for the on-column injector in capillary gas chromatography eliminating discrimination of sample compounds
✍ Galli, M. ;Trestianu, S. ;Grob, K. 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 346 KB 👁 2 views

## Abstract On‐column injection into a hot gas chromatograph oven involves the danger that the bottom part of the needle is warmed up above the boiling point of the solvent in the sample. Consequently parts of the sample are evaporated out of the needle instead of being introduced as a liquid into