Table 3. Identification and relative concentration (μg/g) of volatile compounds in Beijing You Chicken and Dwarf Beijing You Chicken eggs

Compound type	Compounds	Relative concentration (μg/g)		p-value
		BYC	DBYC
Alkanes	Hexane, 3,3-dimethyl-	0.008±0.000	0.013±0.001	0.041
Alkenes	1-Pentene, 3-methyl-	2.371±0.221	ND	0.003
	3-Heptene, 4-ethyl-	ND	0.484±0.034	0.002
Alcohols	(S)-(+)-3-Methyl-1-pentanol	0.048±0.005	ND	0.004
	Cyclobutanol, 2-ethyl-	ND	0.159±0.013	0.002
	meso-3,4-Hexanediol	0.022±0.001	ND	0.002
Aldehydes	Nonanal	0.134±0.012	0.132±0.001	0.806
	Hexanal, 2-ethyl-	0.051±0.003	ND	0.002
	Pentadecanal	0.079±0.018	0.088±0.002	0.497
	Hexanal	ND	0.176±0.049	0.025
Acids	Acetic acid	0.034±0.000	0.033±0.002	0.616
	Formic acid	0.093±0.000	0.066±0.001	0.001
	Butanedioic acid, phenyl-	0.123±0.018	0.16±0.003	0.064
	Pentanoic acid	0.022±0.002	0.039±0.001	0.001
Aromatics	Resorcinol, 2-acetyl-	0.217±0.025	0.179±0.017	0.461
	2,6-Bis(1,1-dimethylethyl)-4-(1-oxopropyl)phenol	0.126±0.005	0.151±0.027	0.257
	Toluene	ND	0.028±0.002	0.002
	Benzene, 1,3-dimethyl-	0.051±0.002	0.077±0.001	0.053
Ketones	3,4-Dimethyldihydrofuran-2,5-dione	0.023±0.009	ND	0.298
	Acetone	0.002±0.000	ND	<0.001
	Ethanone, 2-(formyloxy)-1-phenyl-	0.052±0.005	0.057±0.000	0.261
	2-Butanone, 3-methoxy-3-methyl-	0.017±0.000	ND	<0.001
	2,2-Dimethyl-3-heptanone	ND	0.186±0.006	<0.001
	Cyclobutanone, 2,2,3-trimethyl-	0.005±0.000	0.009±0.000	0.010
	2-Heptanone	0.014±0.009	0.023±0.001	0.255
	Cyclohexanone	ND	4.783±0.253	0.001
	2H-Pyran-2,6(3H)-dione, dihydro-	ND	1.490±0.070	0.001
	2-Cyclopenten-1-one, 2-hydroxy-	5.115±0.728	ND	0.007
Esters	Benzoic acid, 2-phenylethyl ester	0.183±0.013	ND	0.002
	Dibutyl phthalate	0.028±0.004	0.039±0.001	0.144
	2-Methylbenzyl benzoate	ND	0.190±0.020	0.004
	Propanoic acid, 2-methyl-, propyl ester	0.007±0.001	ND	0.008
	Hexadecanoic acid, methyl ester	0.104±0.005	0.092±0.004	0.041
S-containing	Dimethyl sulfone	0.029±0.01	0.043±0.001	0.136
N-containing	Proline, 2-methyl-5-oxo-, methyl ester	0.009±0.001	ND	0.008
	Dicyandiamide	0.012±0.000	ND	0.001
	1H-Tetrazol-5-amine	0.008±0.001	0.012±0.000	0.041
	3H-Pyrazol-3-one, 1,2-dihydro-5-methyl-	ND	1.676±0.078	0.001
	Methyl 1-methylpiperidine-2-carboxylate	2.577±0.266	ND	0.004
	1,3-Oxazetidin-2-one, 3-phenyl-	ND	0.553±0.017	<0.001
	3,5-Diamino-1,2,4-triazole	ND	0.005±0.000	0.001
	Guanidine	ND	0.001±0.000	0.003
	Pyrolo[3,2-d]pyrimidin-2,4(1H,3H)-dione	0.061±0.000	ND	<0.001
Others	Hydroperoxide, hexyl	ND	0.062±0.004	0.002
	2,3-Epoxybutane	0.055±0.009	ND	0.009
	Succinic anhydride	ND	0.107±0.002	<0.001
	3,3-Diethoxy-1-propyne	ND	0.006±0.000	0.002

Data are reported as means±SEM (n=3).
BYC, Beijing You Chicken; DBYC, Dwarf Beijing You Chicken; ND, not detected.