Troubleshooting
Find solutions to product related issues. For unlisted issues please contact local Cytiva service representation.
General advice to achieve good performance
Before using the column make sure that:
- Correct system has been selected in UNICORN System Control
- Correct wavelength has been set for UV/UPC monitor
- All tubing has been properly connected and tubing is not longer than needed
- All connectors are free from leakage, verified by passing a leakage test
- No tubing is folded or twisted
- Online filter, if used, is changed on a regular basis
- Correct buffers are used for the chosen columns and proteins
- All inlet tubing has been immersed in correct buffer solutions
- Enough buffer has been prepared
- Buffers have been equilibrated to the environment temperature
- Buffers/eluents have been degassed if necessary (e.g., in RPC runs)
- Suitable columns have been selected for the target proteins
- Column meets pressure requirements for selected medium
- Columns have been cleaned and prepared according to column instructions
- Samples have been clarified by centrifugation and/or filtration prior to sample loading
- Samples have been adjusted to binding buffer conditions
- Auto sampler (if used) has been prepared according to user manual
- The fraction collector has been filled with appropriate number of microtiter plates or tubes
- Appropriate arrangement for waste handling has been prepared