Table 3.

Most abundant features in each type of samples.

Sample type	Compounds	DF	Peak Area
Soil	Caprolactam	90	4.84E + 10
	2,2-Methylenebis(4-ethyl-6-tert-butylphenol)	90	3.49E + 09
	(9Z)-9-Sulfo-9-octadecenoic acid	100	3E + 09
	BOC-GLU-OTBU	100	2.03E + 09
	1,7-Hydroxy-3-methylxanthone	90	1.3E + 09
	Pentamethylmelamine	90	9.09E + 08
	[6]-Gingerol	90	8.68E + 08
	N,N’-Diphenylguanidine	60	8.64E + 08
	3-O-Butyryl-1,2-O-isopropylidene-alpha-D-glucofuranose	80	7.71E + 08
	1-Cyclohexyl-2-azetidinecarboxylic acid	80	6.83E + 08
Dust	Dodecyl sulfate	50	3.68E + 10
	Myristyl sulfate	70	2.39E + 10
	Bis(2-ethylhexyl) phthalate	70	9.83E + 09
	Pentadecyl hydrogen sulfate	60	5.36E + 09
	Cetyl sulfate	70	4.1E + 09
	Linoleic acid	50	2.85E + 09
	Haplofungin D	80	2.2E + 09
	Tripropyl citrate	90	1.88E + 09
	Haplofungin F	80	2.19E + 09
	Azelaic acid	40	1.09E + 09
Urine	Tetradecanedioic acid	75	5.65E + 10
	Hippuric acid	88	3.64E + 10
	Piperanine	75	3.49E + 10
	S-NONYL-CYSTEINE	63	2.83E + 10
	7-Methylguanine	63	2.01E + 10
	Cyclo(Ala-Ile)	63	1.86E + 10
	N-Phenylacetylglutamine	75	1.23E + 10
	Capryloylglycine	75	1.03E + 10
	N2,N2-Dimethyl-guanosine	75	1E + 10
	Triticonazole	100	2.6E + 09
Food	Piperine	60	7.28E + 10
	Linoleoyl Ethanolamide	70	3.44E + 09
	Choline	90	3.12E + 09
	α-Eleostearic acid	50	1.71E + 09
	1-(P-TOLYL)-1-CYCLOHEXANECARBONITRILE	50	1.21E + 09
	3-hydroxy-N-(1-hydroxy-3-methylpentan-2-yl)-5-oxohexanamide	60	1.1E + 09
	UNII:TYL476W27Y	50	7.71E + 08
	Makomotine C	50	7.34E + 08
	2-(Dipentylamino)-1-(1,2,3,4-tetrahydro-9-phenanthrenyl)ethanol	50	7.24E + 08
	4-Indolecarbaldehyde	70	1.56E + 08
Water	Jasmone	100	2.63E + 09
	6-Phenyl-1-hexanol	80	1.18E + 09
	4-Ethoxy ethylbenzoate	100	8.64E + 08
	Isophorone	80	8.27E + 08
	Valerophenone	80	5.5E + 08
	Meleagrin	70	3.76E + 08
	Cuminaldehyde	60	1.38E + 08
	vanillyl nonanoate	50	9.32E + 08
	3721	50	1.5E + 09

DF Detection frequency = # of sample detected the target compounds/# of total samples.