Table 5.

Main components of VOC.

VA	Concentration/(ng/L)	Warm Mix Flame Retardant Asphalt	Concentration/(ng/L)
toluene	139.5	acrolein	87.3
acetone	62.1	acetone	65.9
p/m-xylene	53.4	propane	43.2.8
acrolein	53.2	n-butane	39.2
propane	48.5	ethane	35.9
propylene	41.6	n-pentane	32.3
ethane	40.7	propylene	24.3
n-butane	39.1	benzene	23.9
n-hexane	38.7	n-hexane	23.3
n-pentane	37.6	heptane	21.4