Detection by ionization of atmospheric gases during analysis by gas chromatography.
D000388:Air / Q000737:chemistry*; D002849:Chromatography, Gas; D005740:Gases / Q000737:chemistry*; D006371:Helium / Q000737:chemistry*
D005740:Gases; D006371:Helium
AIR/chemistry; GASES/chemistry; HELIUM/chemistry