CombiFlash Torrent® User Manual - Isco
CombiFlash Torrent® User Manual - Isco
CombiFlash Torrent® User Manual - Isco
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<strong>CombiFlash</strong> Torrent® <strong>User</strong> <strong>Manual</strong><br />
6.4 Tubing Inspection<br />
WARNING<br />
Risk of fire or equipment damage. Faulty tubing, fittings, and<br />
drains may allow organic solvents to pool in unsafe areas,<br />
creating a potential for dangerous levels of flammable vapors.<br />
Improper draining may damage the instrument’s internal<br />
components.<br />
Perform a tubing inspection monthly:<br />
1. Visually inspect the solvent, waste, and drain tubing. The<br />
tubing must be free of any damage, kinks, or deterioration.<br />
Fittings should show no signs of leaks.<br />
2. Test the drip tray drain by connecting a vacuum or air<br />
supply source to the outlet end of the drain tube. Then,<br />
verify the presence of such vacuum or air supply source on<br />
the drain hole on the drip tray.<br />
Correct any deficiencies before returning the instrument to<br />
operation.<br />
6.5 Flow Cell Cleaning<br />
6.5.1 Post Separation<br />
As a preventive measure, all default column methods finish<br />
the separation run with a high percentage of solvent B<br />
(Figure 6-1). This brief time (two to three column volumes) of<br />
strong solvent flushes residual compounds from the column,<br />
flow cell, and internal tubing.<br />
Skipping the post-separation flush may cause residual<br />
compounds to build up and crystallize, which might result in:<br />
• cross contaminating later separation runs<br />
• higher operating pressures<br />
• reduced flow cell lamp energy<br />
• a noisy baseline on the absorbance trace<br />
• frequent messages recommending flow cell cleaning<br />
(Figure 6-2).<br />
6-4