Table 1. Volatile organic compounds (VOCs) detected from gonads of Mesocentrotus nudus using gas chromatography-mass spectrometry (n = 3).

			Detection
NO.	Rt	Compound	Cultured	Eisenia	Barren	Sato et al. [18]
		Alcohols
8	12.05	Methanol	+	+	+	+
11	13.21	2-propanol	+	+	+	+
12	13.46	Ethanol	+	+	+	+
20	16.57	2-butanol	+	+	+	+
22	17.04	Propanol	+	+	+
31	21.00	Butanol	+	+	+
45	30.41	2-ethylhexanol	+	+	+	+
		Aldehydes
1	5.87	Acetaldehyde	+	+	+	+
2	6.74	Dimethoxymethane	+	+	+	+
7	11.78	Acetal	+	+	+	+
33	21.97	2-ethylhexanal	+	+	+
39	25.10	Octanal	+	+	+
42	28.12	Nonanal	+	+	+	+
46	30.92	Decanal	+	+	+	+
47	32.01	Benzaldehyde	+	+	+	+
		Aromatic compounds
4	7.79	Methylcyclohexane	+	+	+	+
13	13.63	Benzene	+	+	+
23	17.26	Toluene	+	+	+	+
27	19.87	Ethylbenzene	+	+	+	+
28	20.34	Xylene	+	+	+	+
35	23.13	Ethyltoluene	+	+	+
36	23.77	Trimethylbenzene	+	+	+	+
37	24.23	Styrene	+	+	+	+
44	29.74	Dichlorobenzene	+	+	+	+
		Esters
6	11.56	Ethyl acetate	+	+	+	+
14	14.80	Propyl acetate	+	+	+	+
24	17.48	S-methyl thioacetate	+	+		+
25	18.18	Butyl acetate	+	+	+
		Halomethanes
10	12.92	Dichloromethane	+	+	+	+
15	15.39	Trichloroethane	+	+	+
19	16.26	Chloroform	+	+	+	+
43	29.63	Bromoform	+	+
		Hydrocarbons
16	15.53	Decane	+	+	+	+
21	16.68	α-pinene	+	+	+	+
26	18.56	Undecane	+	+	+	+
29	20.43	Δ3-carene	+	+	+
32	21.28	2,5,6-trimethyloctane	+	+	+
34	22.15	Limonene	+	+	+	+
38	24.61	Tridecane	+	+	+	+
		Ketones
5	9.12	Acetone	+	+	+	+
9	12.13	2-butanone	+	+	+	+
18	16.06	4-methyl-2-pentanone	+	+	+	+
30	21.00	3-heptanone	+	+	+
41	26.59	6-methyl-5-hepten-2-one	+	+	+
48	35.20	Acetophenone	+	+	+	+
		Others
3	7.09	Dimethyl sulfide	+	+	+	+
17	15.72	Acetonitrile	+	+	+	+
40	25.42	Bis-(methylthio)-methane	+	+	+	+

An explanation of the terms Cultured, Eisenia and Barren is provided with Fig 1.

Rt indicates retention time (min).