TCD filament for corrosive gas analysis

[Mreza555]

Hi
There is a question about corrosion of TCD filament with a gas containing 30% H2S. the GC system is a RGA and there are four H2S-rich samples per week. is the typical tungsten filament suitable for this system? or it requires another filaments like nickel or Gold coated ones?

Thanks

[antonk]

This table states - they should be gold-plated W
https://agc-instruments.com/product/the ... filaments/

or Pt-Rh or something from precious metals