Make up gas for NPD (FTD) detector

Discussions about GC and other "gas phase" separation techniques.

2 posts Page 1 of 1
Hi all,

As I've known, NPD detector can operate with nitrogen as make up gas. But I just learn that the Shimadzu 2010 GC NPD (FTD) uses only Helium as make up gas. I am puzzled why's that.
Can I use nitrogen instead ?
You can use nitrogen as make up but helium is preferred. You must bear in mind that the amount of hydrogen relative to the other gases will affect
nitrogen-to-carbon selectivity of the detector so helium is usually the gas mainly used.
2 posts Page 1 of 1

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