This standard describes the specifications for the quantitative analysis of the following components of natural gas:heliumhydrogenargonoxygennitrogencarbon dioxidesaturated hydrocarbons from C1 to C5hydrocarbon fractions from C6 upwardsaromatic compounds as benzene and tolueneThe gas-chromatographic methods determine the components in the following ranges:oxygen: 0,001 % (n/n) to 0,5 % (n/n)helium: 0,001 % (n/n) to 0,.5 % (n/n)hydrogen: 0,001 % (n/n) to 0,5 % (n/n)argon: 0,01 % (n/n) to 0,5 % (n/n)nitrogen: 0,001 % (n/n) to 40 % (n/n)carbon dioxide: 0,001 % (n/n) to 40 % (n/n)methane: 50 % (n/n) to 100 % (n/n)ethane: 0,02 % (n/n) to 15 % (n/n)propane: 0,001