Table 2.
Van Deemter Coefficients for C-18 and C-30 Columns
| Column Type | ID | Temp | Van Deemter Coefficientsa | νopt | ||
|---|---|---|---|---|---|---|
| (°C) | A | B | C | |||
| Polymeric-like C-18 | S | 10 | 2.43 | 0.83 | 2.11 | 0.63 |
| 25 | 1.58 | 0.96 | 0.86 | 1.06 | ||
| 40 | 1.26 | 1.27 | 0.70 | 1.35 | ||
| Polymeric-like C-30 | F | 10 | 2.45 | 1.05 | 1.25 | 0.92 |
| 25 | 2.23 | 1.28 | 0.89 | 1.20 | ||
| 40 | 2.21 | 1.46 | 0.81 | 1.34 | ||
| Monomeric-like C-18 | R | 10 | 0.28 | 1.61 | 0.56 | 1.70 |
| 25 | 0.70 | 1.78 | 0.44 | 2.01 | ||
| 40 | 0.74 | 2.12 | 0.47 | 2.13 | ||
| Monomeric-like C-30 | Q | 10 | 4.70 | 1.35 | 0.11 | 3.57 |
| 25 | 4.70 | 1.56 | 0.16 | 3.16 | ||
| 40 | 4.57 | 1.99 | 0.28 | 2.67 | ||
a
h = A + B/ν+ Cν; where h is the reduced plate height and ν is the reduced velocity. The coefficients A, B, and C reflect eddy-diffusion, longitudinal diffusion, and resistance to mass transfer, respectively.