The GERSTEL SPE is based on standard 1, 3, or 6 mL cartridges, using disposable needles for liquid transfer to eliminate carry-over. Tightly controlled flow rates provide improved extraction recovery, precision and ruggedness compared with manual procedures. Flexible rinse and elution capabilities enable the MPS to handle a variety of sample types. Automated SPE can be combined with liquid sample preparation, such as standard addition, and with introduction to LC/MS or GC/MS systems. SPE is performed during analysis of the preceding sample ensuring maximum system productivity. The complete system is controlled by the GERSTEL MAESTRO software or through the Agilent Technologies ChemStation. (more)