ISSN:
0935-6304
Keywords:
Capillary gas chromatography
;
Extra-column effects
;
Computer optimization
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The contribution of extra-column effects to the height equivalent to a theoretical plate (HETP) in capillary gas chromatography is calculated. Four extra terms are added to the Golay-Giddings equation and evaluated in order to verify their significance. The paradox of negative A terms is resolved by curve fitting of experimental values to the theoretical function of HETP, including the extra-column effects. The importance of the A term and the diffusion process for an injection in split mode were determined to be negligible compared to the other terms in the HETP equation. On the other hand, extra-column contributions, proportional to the square of the gas velocity, are of significant importance. This contribution is inversely proportional to the column length.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jhrc.1240131007
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