Extra Column Dispersion - Low Dispersion Connecting Tubes > Serpentine Tubes > Page 32

Serpentine Tubes

The low dispersion serpentine tube (6), an alternative to the coiled tube, was designed to increase secondary flow above that which occurs in a simple coiled tube by reversing the direction of flow at each serpentine bend. A diagram of a serpentine tube is shown in figure 12.

Ref (P) J. Chromatogr. 268(1978)681

Internal radius, 0.010 in. (0.0127 cm), external radius 0.020 in. (0.025 cm), linear length 17 in., serpentine length 15 in., serpentine amplitude, 0.050 in.

Figure 12. The Low Dispersion Serpentine Tube