Faster Cycle Times and Near Zero Carryover Injection Automation

Today’s Mass Spectrometers are so sensitive that carryover can become an issue.

To meet today’s requirements for fast, clean and reproducible LC/MS injection; CTC have developed the Dynamic Load and Wash (DLW) Option for the PAL system.

Now the sample is no longer in contact with the syringe but it is aspirated into a holding loop. The syringe only acts as an aspirator and dispenser device in order to exactly measure the amount of sample which needs to be injected. This yields to excellent reproducibility. After injection, the whole sample path including the valve and the needle is washed from the rear with up to 2 different solvents. Active micro-pumps deliver the required quantity of solvent fast and reliably. An active solenoid valve precisely stops solvent delivery or switches between solvents. At the end of the injection cycle all parts which have been in contact with the sample are completely clean.

As a result, near-zero carryover is achieved for most components.

For more information on the DLW option and the full CTC range, visit our website www.Presearch.co.uk