Table 2.

Authentic standards, scanned ions, calibration equations, and odor descriptions in the determination of aroma compounds.

Compound	Ions (m/z) a	Calibration Equation b	R2	Odor Description c
Propanal	58.1, 57.1, 44.0, 42.0	$y=\left(0.00002\right)x+0.1933$	0.9905	Pungent
Ethyl acetate	43.1, 61.1, 70.1, 45.1	$y=\left(0.000005\right)x-1.1427$	0.9945	Fruit, wine
Octanal	41.1, 43.1, 57.1, 84.1	$y=\left(0.0000007\right)+0.0121$	0.9983	Citrus, fresh
Nonanal	57.1, 41.1, 55.1, 98.1	$y=\left(0.0000002\right)x-0.0088$	0.9994	Citrus, fatty
1-octen-3-ol	57.1, 43.1, 72.1, 85.1	$y=\left(0.00000008\right)x+0.0065$	0.9989	Green, mushroom
(E)-2-octenal	70.1, 55.1, 41.1, 83.1	$y=\left(0.0000002\right)x+0.0393$	0.9908	Unpleasant, nut, fatty
Acetic acid	43.1, 45.0, 60.1, 42.1	$y=\left(0.0003\right)x+163.61$	0.9980	Vinegar, sour
Benzaldehyde	105.1, 106.1, 77.1, 55.1	$y=\left(0.00000008\right)x-0.0241$	0.9948	Almond, cherry-like
1-nonanol	56.1, 70.1, 41.1, 83.1	$y=\left(0.00000006\right)x+0.0034$	0.9996	Rose, floral
Methyl salicylate	120.1, 92.1, 152.1, 65.1	$y=\left(0.00000001\right)x+0.0022$	0.9906
Guaiacol	109.1, 124.1, 81.1, 53.1	$y=\left(0.0000002\right)x-0.01638$	0.9997	Smoky, sweet
Geranylacetone	69.1, 43.1, 151.1, 136.1	$y=\left(0.00000003\right)x+0.00000005$	0.9993	Sweet, rose
Phenylethyl alcohol	91.1, 92.1, 122.1, 65.1	$y=\left(0.0000003\right)x-0.0483$	0.9948	Floral, rose, honey
Creosol	138.1, 123.1, 95.1, 67.1	$y=\left(0.0000001\right)x+0.0049$	0.9984	Dusty, woody
4-ethylguaiacol	137.1, 152.1, 122.1, 91.1	$y=\left(0.00000005\right)x-0.0174$	0.9989	Smoky
Anisaldehyde	135.1, 136.1, 77.1, 92.1	$y=\left(0.0000002\right)x+0.035$	0.9960	Phenolic
P-cresol	107.1, 108.1, 77.1, 79.1	$y=\left(0.000001\right)x-39.412$	0.9997	Phenolic, animal
4-ethyl-phenol	107.1, 122.1, 77.1, 91.1	$y=\left(0.00000007\right)x+0.008$	0.9986	Herbal, phenolic

^a Monitored ions used for quantification. ^b Variables: $x$ is the peak area relative to that of the internal standard, 2-methyl-3-heptanone, and y is the concentration (ng/g) in the sample relative to that of the internal standard, 2-methyl-3-heptanone. ^c Sniffed odors determined by GC-O analysis.