Automated Linex EXchange
routine analysis of samples with high levels of involatile compounds, particulates and other solid matrix materials.
Matrix residue from samples can contaminate a GC inlet liner afterwithin a few runs, leading to peak broadening and loss of analytes through adsorption in the liner. Under such conditions, the analyst is forced to perform frequent liner replacement, an operation which normally requires manual intervention. Running large series of samples will represent a serious challenge.
The GERSTEL Automated Liner EXchance ALEX technology automates the task of replacing liners in the GERSTEL Cooled Injection System CIS. 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 using the GERSTEL MultiPurpose Sampler MPS. 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 MPS, the ALEX system enables automated CIS 4 liner exchange at user defined intervals in a sequence
.The GERSTEL MAESTRO-Software provides integrated control of the MPS, ALEX system and CIS. In combination with the Agilent ChemStation, a single method and sequence table control the entire system including GC and MS.
GERSTEL eLEX: Fast and easy manual GC inlet liner exchange.
When analyzing samples with high levels of involatile or insoluble matrix residue, GC inlet liners can become contaminated a after just a few runs. Matrix build-up can lead to peak broadening and loss of analytes through adsorption in the liner. Under such conditions, in order to get correct analysis results, the analyst must regularly perform a liner exchange, an operation which normally requires several manual steps. Using eLEX this complex task becomes quite simple: An ALEX sampling head is mounted on top of the Cooled Injection System (CIS) inlet and whenever the liner has to be exchanged the pneumatic lock is released. The used liner and transport adaptor are then easily and quickly manually removed and replaced by a clean liner and transport adaptor. The ALEX sampling head is then pneumatically locked and the system is ready for the next direct sample injection into the liner through the septum in the transport adaptor. In order to fully automate the liner exchange process, eLEX can be upgraded to the Automated Liner EXchange (ALEX) system, which performs automated exchange of up to 14 or 98 CIS liners at user-defined intervals in one automated sequence.
Features and benefits
- Add-on available for all common GC & GC/MS systems
- Easy replacement of contaminated liners provides reliable results and high system utilization
- Upgrade of eLEX to fully Automated Liner EXchange ALEX using the MultiPurpose Sampler MPS