ATEX and Matrix Elimination

Martin Perkins

28th March 2013

In GC-MS, when working with complex matrices, the ability to be able to separate analytes from involatile material upon injection is worth having.

Separation upon the basis of volatility is possible by carefully controlling the temperature of the inlet so that only material that enters the column is of a sufficiently low volatility to transit the whole analytical system without fouling it up.

There are two ways on doing this. One uses the GERSTEL ALEX (Automated Liner Exchanger) which keeps involatile material in the inlet liner and automatically changes the liner as often as needed.

An alternative, that is my personal favourite, is to use the GERSTEL ATEX (Automated Tube Exchanger) system. This works in a similar way, but instead makes the injection into a GERSTEL TDU (rather than directly into the inlet) and uses the GERSTEL CIS4 inlet to focus the analytes.

Why do I like this?

  1. You have great flexibility in the size and nature of the sample you inject.
  2. The secondary focusing that the CIS4 provides, makes the system much easier to set-up and use.
  3. The GERSTEL CIS/TDU/MPS combination offers fantastic all-round sample handling flexibility (see this video).

If you want to know more about this approach to working with high matrix samples, why not come along to our conferences (details can be found here), where there will be discussion on this and many other topics that will shine novel lights upon the work that you do.

These are popular meetings and places are limited so please book early.

To register call: +44 (0)1223 279210 or email