Table 2.

Summary of calibration functions (i.e., linear fit, $r^2$-value, LOD and LOQ derived from peak area analysis) over a concentration range from 1 ppm to 25 ppm.

VOC	Wavenumber (cm−1)	Linear Fit	${\mathit{r}}^2$	LOD (ppm)	LOQ (ppm)
13DCB	1577	$0.03046x+0.06101$	$0.99458$	$1.385\pm 0.030$	$4.618\pm 0.101$
pCYM	1515	$0.03421x+0.05186$	$0.9882$	$0.669\pm 0.011$	$2.229\pm 0.035$
EB	1495	$0.00428x+0.01347$	$0.99631$	$1.474\pm 0.045$	$4.914\pm 0.150$
12DCB	1434	$0.00414x+0.00982$	$0.99958$	$5.943\pm 0.173$	$19.809\pm 0.576$
124TCB	1035	$0.04119x+0.01743$	$0.99912$	$0.639\pm 0.006$	$2.131\pm 0.020$
CAR	989	$0.02025x-0.01699$	$0.99918$	$1.219\pm 0.020$	$4.064\pm 0.068$
TCE	931	$0.01358x-0.01522$	$0.97704$	$1.074\pm 0.035$	$3.581\pm 0.117$
TeCE	910	$0.07841x+0.15213$	$0.98604$	$0.560\pm 0.014$	$1.866\pm 0.047$
MYR	892	$0.01831x+0.06601$	$0.98826$	$2.262\pm 0.075$	$7.540\pm 0.251$
pXYL	795	$0.02739x-0.0645$	$0.97921$	$4.762\pm 0.307$	$15.873\pm 1.024$