Dear all,

I am trying to set up a GC with FID and microECD detectors. I have to use the following gases (the source is in parenthesis):

- N2 (cylinder)
- Ar/5%CH4 (cylinder)
- H2 (H2 generator)
- Air (cylinder)

I am considering purification systems for these gases and I have some doubts:

- What is the basic difference between traps and filters? Filters have a lower efficiency?
- Would you recommend S traps?
- Would you recommend triple filter cartridges?

I thank you in advance for your help. This is the first time I have to buy this type of equipment.

Best regards.