Injection of samples via the system pumps is possible. Filter the sample before injection. When using the pump P 6.1L for injection of sample the filter located in the pressure sensor has to be removed to avoid blockage. Insert the adapter (article number A9652) which you can find in the accessory kit of the pump. The adapter has no filter effect. Use an inline filter for column protection which you can simply install in front of your column (article number: A3379, replacement frits: A3379-1).
