Prediction of gas chromatographic peak width in capillary columns at different temperatures, carrier gas flows, column lengths, inside diameters and carbon numbers
✍ Scribed by Kanit Krisnangkura; Varaporn Pongtonkulpanich
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 142 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1615-9306
No coin nor oath required. For personal study only.
✦ Synopsis
Prediction of gas chromatographic peak width in capillary columns at different temperatures, carrier gas flows, column lengths, inside diameters and carbon numbers
Width factor (w f ), relative band broadening (b r ) and retention factor are linearly correlated as ln w f = lnb r + lnk [Chromatographia (2002) 56,99100101102103. The k and b r are thermodynamic and kinetic energy parameters, and expanded to cover volumetric flow of carrier gas, temperature, phase ratio (b) and carbon number (z). For columns of the same stationary phase and b value but of different lengths, width at base (w b ) can be predicted with the same numerical values of the constants. The average absolute differences between predicted and experimental w b for BP-1 columns of 30, 20 and 10 m are 1.27%, 1.21% and 1.37%, respectively. In predicting w b of n-alkanes eluted from columns of the same stationary phase but of different ID, only the differences of ln b are required for adjustment of one of the numerical values. The average absolute differences between w b (cal) and w b (exp) values for columns of 0.53, 0.32, 0.22 and 0.15 mm ID are 2.06, 3.67, 3.82 and 3.47%, respectively.