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. 2013 Dec 5;13(12):16759–16800. doi: 10.3390/s131216759

Table 3.

Olfactory description, chemical identity and modified frequency percentage MF (%) for each odorant identified in WPC prototype (Adapted from [82] with permission from Elsevier).

RT (min) KIexp a KIrefb Odor Descriptor MF (%) Compound
7.268 1011 970 Diacetyl, cream, sweet, yogurt, curd, wood, fruity 83 Diacetyl (2,3-Butanedione)
9.188 1120 1084 Grass, herb, green, flower, solvent, chemical 76 Hexanal
10.468 1177 1150 Fruity, ester, candies, jelly, plastic, varnish 53 m-Xylene
13.849 1321 1280 Aldehyde, medicine, chemical, herb, flower, field, lemon, grapefruit, orange 82 Octanal
16.314 1424 1385 Aldehyde, bleach or lemon cleaner, unpleasant 77 Nonanal
17.668 1481 1450 Acid, unpleasant, solvent, glue, sweat, sunflower seeds 79 Acetic acid
18.732 1527 1484 Aldehyde, powdered sugar, acid 51 Decanal
19.029 1540 1490 Gas, burnt, green shield bug, fresh wood, fried, oily 71 Acetylfuran
19.316 1553 1491 Dry fruit, nut, almond, mold, dense 58 Camphor
21.655 1658 - Cheese, rancid cheese, butiric or propanoic acid 77 Unknown
22.611 1702 - Acid, cheese, butiric acid 76 Unknown
23.080 1724 1720 Bug, nail polish remover, naphthalene balls 53 α-Terpineol
26.123 1872 1829 Acid, trash, waste, foot, wood, hair removal wax, licorice 74 Hexanoic acid (caproic acid)
26.508 1891 1859 Phenol, shoeshine, medicine, sweat, bug, vanilla 65 2-Methoxyphenol (Guaiacol)
28.105 1973 - Phenol, aromatic, sweet, zinc oxide adhesive plaster, opium, hospital 74 Unknown
30.857 2075 - Unpleasant, acid, wood, manure 65 Terpin hydrate
32.727 2130 2198 Lactone, burnt, car tire, rubber 35 c 2-Methoxy-4-vinylphenol (4-Vinylguaiacol)
35.655 2204 2358 d Flower, salt water, hair removal wax 38 c Diethyl phthalate (DEP)
39.374 2270 2569 Car tire, vanilla, soluble chocolate powder, burnt 53 Vanillin
a

Kovats retention index calculated from BP-20, 30 m column;

b

Kovats retention index reported in the Flavornet Database (Carbowax™ 20 m column);

c

Compounds with MF < 50% but relevant to the sample;

d

Kovats retention index calculated from DB-Wax 60 m column.