Table 1. Standard calibration for determination and comparison of monoterpene compound detection in encloser chamber and forest air.

Compound	Purity (%)	Standard calibration curve		Comparison of monoterpene compound detection
		Regression equation	Correlation coefficient(r2)	Enclosure chamber air (n=90)	Forest air (n=135)
α-Pinene	98.0	y=3297x +2785	0.999	◎	◎
β-Pinene	94.0	y=2284x +1491	0.999	◎	◑
β-Phellanderene	95.0	y=3641x +2617	0.999	◎	◑
Chemphene	95.0	y=57x +49	0.998	◑	◑
β-Myrcene	95.0	y=4878x +3348	0.998	◑	◑
di-Limone	97.0	y=5784x +3591	0.997	◑	◑
Terpinolene	85.0	y=4570x +3182	0.999	◑	●
Sabinene	80.0	y=3659x +4357	0.999	◑	●
3-Carene	99.0	y=3125x +3084	0.999	●	◑
Camphor	96.0	y=12413x +11387	0.999	●	◑
Terpineol	93.1	y=2720x +254	0.999	●	●
α-terpinene	95.0	y=6642x +4840	0.997	●	●
r-Terpinene	85.0	y=5247x +2419	0.998	●	●