I have an RGA, it has the typical channels ie aux TCD channel with Nitrogen carrier gas to quantify for Hydrogen, Helium carrier gas for the hydrocarbon fid channel and Helium carrier gas for the permanent gases ie carbon dioxide, oxygen, Nitrogen, carbon monoxide, etc. for the bleepin (pardon my language) life of me, I cannot figure out why I am getting a Nitrogen and oxygen peak consistently on my permanent gases channel even though I am injecting a friecken blank!!!!

Also, I am getting a false Hydrogen peak on my aux TCD channel with Nitrogen as carrier injecting the stupid blank as well. I do understand that Hydrogen and Helium are closely eluting on this column so that may possibly the Helium carrier. My question is--is this the norm for RGA GC? I work on GCs and even on RGA GCs but my experience with the actual application up to now is limited. I know I know it will be suggested to check the valves, etc but I just wanted to know is this normal for RGA analysis? If so, how in the hell do you give accurate values for Hydrogen, oxygen and Nitrogen???