Author : V. Pongtonkulpanich and K. Krisnangkura
Journal : Chromatographia, 2004, Volume 59, Issue 7–8, pp 469–473.
More Information : https://doi.org/10.1365/s10337-004-0220-1
Abstract
The linear relationship between the natural logarithm of width factor (ln p′) and natural logarithm of retention factor (ln k) proposed by Lomsugarit et al. (Chromatographia (2002) 56:99–103) is re-analyzed. The γ value is found to vary with temperature (T) but it is independent of carbon number. By incorporating the temperature effect into the equation of Lomsuagrit et al, the peak width can be predicted with higher accuracy. The unadjusted widths (w R ) of n-alkanes (C14–C18), fatty alcohols (C12:0–C18:0) and fatty acid methyl esters (FAMEs, C16:0–C18:0) can be predicted from their retention indices (I) with deviations from experimental values of < 4%. Also, the importance of hold-up width and the relationship between w R and different chromatographic parameters are discussed
Keywords
Gas chromatography, Gas hold-up width, Plate number, Temperature effect, Width factor