Based on the robust and established FREESTYLE XANA robotic system for large-volume water samples (0.1 L – 10 L), LCTech has developed a solution specifically for PFAS applications, in which plastics containing fluorine such as PTFE are avoided.
The column is firmly connected to the arm, therefore sample and solvent can be dosed precisely and at a constant flow rate via the SPE column with positive pressure using a syringe pump. Drying is also carried out via positive pressure with nitrogen.
In the processing station on the FREESTYLE platform, 3 SPE columns are processed simultaneously in 2 blocks: In block 1, 3 columns are conditioned, loaded and washed in parallel, while in the following block 2, 3 columns are dried in parallel.
The following videos show the processing station of the FREESTYLE XANA. They are identical for all XANA models:
The external processing station is responsible for the fluidics management of the water module with the pumping mechanics of up to 10 L samples, the valves and the sensor technology for process monitoring.
All components in the fluidic way ( tubes, valves, ...) are PTFE-free!
The sample rack offers space for 24 x 1 L sample bottles; optionally 3 sample containers with up to 10 L volume each can be connected to the system.
Automatic rinsing of the sample bottles possible for optimal quantitative transfer of the sample.
The results show that reliable and robust PFAS analysis can be performed via fully automated sample preparation on the FREESTYLE XANA PFAS robotic system in combination with EluCLEAN®PFAS SPE cartridges. The recoveries shown are very well within the accepted range of 70 - 130%. The precision is also well within the required range, with RSDs of 10% or less. Further results can be found in the following Application Note (AN0054):