Table 1.

Names and Molecular Mass of Components for Extended Natural Gas Analysis. Components are listed in order of retention times.

Component Name	Molecular Mass
nitrogen	28.013
methane	16.043
carbon dioxide	44.010
ethane	30.070
propane	44.097
iso-butane	58.123
n-butane	58.123
iso-pentane	72.150
n-pentane	72.150
neopentane	86.177
cyclopentane + 2,3-dimethylbutane	78.156
2-methylpentane	86.177
3-methylpentane	86.177
n-hexane	86.177
methylcyclopentane	84.162
benzene	78.114
cyclohexane	84.162
dimethylpentanes	100.204
2-methylhexane	100.204
dimethylcyclopentanes	98.189
3-methylhexane	100.204
n-heptane	100.204
methylcyclohexane	98.189
ethylcyclopentane	98.189
dimethylhexanes	114.231
trimethylcyclopentanes	112.215
toluene	92.141
methylheptanes	114.231
Dimethylcyclohexanes	112.215
methylethylcyclopentanes	112.215
n-octane	114.231
C₉ paraffins	128.258
C₉ naphthenes	126.243
C₈ benzenes	106.168
n-nonane	128.258
C₉ benzenes	120.195
C₁₀ and heavier	142.285