GERSTEL AutomatedLinerEXchange ALEX

Routine analysis of samples with high content of nonvolatile compounds, particulates and other solid matrix material

Matrix material from samples can contaminate a GC-liner, leading to peak broadening and loss of
compounds through adsorption in the liner within a few GC runs. Under such conditions, the analyst is
forced to perform frequent liner replacement, an operation which normally requires manual interven
tion. Running large series of samples will represent a serious challenge.

The GERSTEL Automated Liner EXchance ALEX technology performs the task of replacing liners
in the GERSTEL Cooled Injection System CIS 4. The ALEX system enables fully automated GC
analysis of samples with a high matrix load as well as "dirty" extracts, which can be directly injected
into the CIS 4 using the GERSTEL Multi Purpose Sampler MPS 2. Specially designed trays can hold
up to 14 or up to 98 CIS 4 liners in individually sealed, contamination-free storage compartments.

In connection with the GERSTEL MPS 2, the ALEX
system enables automated CIS 4 liner exchange at
predetermined regular intervals in a sequence.
The GERSTEL MAESTRO-Software provides integrated
control of the MPS 2, ALEX system and CIS 4. In
combination with the Agilent ChemStation, a single
method and sequence list control the entire system
including GC and MSD.