Table 2.

Concentrations and functional group classifications of each component in the mixture of 31 kinds of volatile organic compounds (VOCs) in nitrogen.

Group	Component	Concentration in Cylinder [ppm]
Aromatic Hydrocarbon	Benzene	0.52
	Toluene	0.50
	o-Xylene	0.50
	m-Xylene	0.50
	Styrene	0.50
	Ethylbenzene	0.50
	n-Propylbenzene	0.49
	1,2,3-Trimethylbenzene	0.50
	1,2,4-Trimethylbenzene	0.50
	1,3,5-Trimethylbenzene	0.50
	o-Ethyltoluene	0.50
Aliphatic Hydrocarbon	n-Hexane	0.50
	2-Methylpentane	0.50
	3-Methylpentane	0.50
	n-Heptane	0.50
	2,4-Dimethylpentane	0.51
	n-Octane	0.50
	2,2,4-Trimethylpentane	0.50
	n-Nonane	0.50
	n-Decane	0.50
	n-Undecane	0.50
	n-Dodecane	0.100
	Methylcyclopentane	0.50
	Cyclohexane	0.50
	Methylcyclohexane	0.50
Terpene	α-Pinene	0.50
	β-Pinene	0.51
	(+)-Limonene	0.50
Halide	p-Dichlorobenzene	0.50
Ester	Butyl acetate	0.99
Ketone	Methyl i-butyl ketone	2.99
Total		18.11 *

* 18.11 [ppm] = 8.92 × 10⁴ [μg/m³].