✦ LIBER ✦

The influence of evaporative dynamics on precision in split capillary GC

✍ Scribed by Bowermaster, J.

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 573 KB
Volume: 11
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240111111

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✦ Synopsis

The kineticsof sample evaporation wasstudied for four common injection liners at various temperatures.The ratesof solvent and sample evaporation were measured. The sample distribution at the split point was probed by inserting two capillary columns in one injector. Greater homogeneity at the split point corresponded to higher precision (better correlation between the sample and internal standard peak areas). Evidence of aerosol formation using inverted cup inlet liners wasseen. Packed column precision was better than capillary precision in each case, ie., using straight split liners, inverted cup liners, and cold on-column injection. Capillary precision is best when the sample and internal standard elute close together, and may be improved by using solvents that vaporize slowly.

2 Experimental

Model 5880A (level 4) and Model 5890A gas chromatographs (Hewlett Packard) equipped with flame ionization 802 Journal of High Resolution Chromatography & Chromatography Communications

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