Table 1. The relative peak area and amount of volatile organic compounds produced by Bacillus amyloliquefaciens SQR-9.

RT	Volatile organic compounds	Relative peak area (%)	Production (μg)
12.913	2-nonanone	4.41 ± 0.19	4.15 ± 0.59
14.158	2-decanone	0.44 ± 0.04	0.25 ± 0.08
17.20	2-undecanone	11.1 ± 0.29	9.14 ± 0.55
20.267	2-dodecanone	2.83 ± 0.08	1.2 ± 0.38
21.763	2-tridecanone	7.83 ± 0.59	5.25 ± 1.20
16.432	2-tetradecanone	4.23 ± 0.19	3.2 ± 0.61
18.056	2-pentadecanone	1.35 ± 0.05	1.0 ± 0.28
18.529	2-nonadecanone	3.74 ± 0.59	1.8 ± 0.37
24.444	Heptadecane	13.1 ± 0.18	12.6 ± 1.5
15.287	Pentadecane	5.41 ± 0.25	4.7 ± 0.63
12.156	Dodecane	1.23 ± 0.05	0.5 ± 0.15
12.505	Tridecane	0.98 ± 0.02	1.25 ± 0.10
10.995	Nonanal	0.29 ± 0.01	0.2 ± 0.01
14.411	Undecanal	9.16 ± 0.24	7.75 ± 0.38
14.65	Hexadecanal	1.55 ± 0.09	1.0 ± 0.21
20.951	n-hexanoic acid	4.99 ± 0.16	1.75 ± 0.38
26.151	Hexadecanoic acid	5.54 ± 0.19	2.5 ± 0.29
28.221	Trans-13-octadecanoic acid	0.74 ± 0.05	0.45 ± 0.02
28.453	Oleic acid	1.00 ± 0.04	0.5 ± 0.07
13.462	Phenylethyl alcohol	0.98 ± 0.01	0.95 ± 0.12
8.076	Furan 2-ethyl-5-methyl	0.72 ± 0.01	–
28.584	Phenol, 4,4′-(1-methylethylidene) bis-	1.85 ± 0.01	1.1 ± 0.24

The values after ± indicate the standard deviations. The peak area was calculated in percentage over the total area of all peaks. The pure standard compounds were purchased from Sigma, Tokyo Chemical Industry Co., Ltd. (TCI, Japan) and Aladdin Reagent Database, Inc. (Shanghai, China). RT = retention time.