Table 2.

Correlation Coefficients (R²) of Hydrocarbons with Ethyne and Toluene

	R2 with ethyne			R2 with toluene
Hydrocarbons	Hazy days	Normal days	Hydrocarbons	Hazy days	Normal days
Ethane	0.62	0.65	Benzene	0.53	0.48
Propane	0.62	0.83	Ethylbezene	0.78	0.84
Ethene	0.66	0.63	m/p-Xylene	0.79	0.85
Propene	0.66	0.76	o-Xylene	0.70	0.81
Benzene	0.67	0.73	Total aromatics	0.93	0.98
Toluene	0.49	0.55
Total NMHCs	0.76	0.79