Volatile compounds in two varieties of teff (Eragrostis tef (Zuccagni) Trotter) cultivated in Ethiopia by gas chromatography-mass spectrometry

Figures & data

Table 1. The peak number, name of volatile compounds, their chemical class, retention time (RT) and percentage peak area (mean±SD, n = 3) of the identified compounds in the white teff grain sample by GC-MS method from the dichloromethane extract

Peak No.	Compound name	Chemical class	RT (min)	Peak area (%)	Matching (≥80%)
2	Furfural	Aldehyde	5.43	29.9 ± 1.5	90
4	2-Furanmethanol	Alcohol	6.08	2.30 ± 0.08	94
5	2-Methyl-2-cyclopenten-1-one	Ketone	6.31	1.78 ± 0.05	93
6	1-(2-Furanyl)ethanone	Ketone	6.54	5.11 ± 0.2	86
9	5-Methyl-2-furancarboxaldehyde	Aldehyde	7.57	15.1 ± 0.6	95
13	Benzeneacetaldehyde	Aldehyde	8.66	3.16 ± 0.11	91
15	2-Methylbenzofuran	Furan	8.89	0.53 ± 0.02	94
19	2-Methoxyphenol	Alcohol	9.40	2.09 ± 0.06	87
21	2-(2-Furanylmethyl)-5-methylfuran	Furan	9.82	2.44 ± 0.07	93
27	1-(2-Furanylmethyl)-1 H-pyrrole	Pyrrole	10.6	1.49 ± 0.04	90
31	2,4-Dimethylphenol	Alcohol	11.0	1.02 ± 0.03	95
34	2-Methoxy-1,3-dimethylbenzene	Ether	11.3	0.15 ± 0.00	83
40	4-Ethyl-2-methoxyphenol	Alcohol	12.0	0.82 ± 0.02	91
46	2-Methoxy-4-vinylphenol	Alcohol	12.8	0.50 ± 0.01	90
47	Indole	Indole	13.6	0.50 ± 0.01	93
51	2-Methyl-1 H-indole	Indole	14.5	0.13 ± 0.00	92

Note: There are other minor compounds whose NIST matching were <80%.

Table 2. The peak number, name of volatile compounds, their chemical class, retention time (RT) and percentage peak area (mean±SD, n = 3) of the identified compounds in the brown teff sample by GC-MS method from the dichloromethane extract

Peak No.	Compound name	Chemical class	RT (min)	Peak area (%)	Matching (≥80%)
1	Furfural	Aldehyde	5.41	38.1 ± 1.7	80
4	5-Methyl-2-furancarboxaldehyde	Aldehyde	7.55	23.8 ± 1.0	91
7	Benzeneacetaldehyde	Aldehyde	8.65	4.06 ± 0.2	87

Note: There are other minor compounds whose NIST matching were <80%.

Table 3. The peak number, name of volatile compounds, their chemical class, retention time (RT), percentage peak area (mean±SD, n = 3) and matching of the identified compounds in the white teff grain samples by GC-MS method from the n-hexane extract

Peak No.	Compound name	Chemical class	RT (min)	Peak area (%)	Matching (≥80%)
3	2-[(Methylthio)methyl]furan	Furan	7.21	7.27 ± 0.3	93
4	5-Methyl-2-furancarboxaldehyde	Aldehyde	7.49	10.2 ± 0.4	95
6	Benzeneacetaldehyde	Aldehyde	8.62	4.03 ± 0.2	94
7	2-(2-Furanylmethyl)-5-methylfuran	Furan	9.80	2.40 ± 0.07	96
8	1-(2-Furanylmethyl)-1 H-pyrrole	Pyrrole	10.55	1.62 ± 0.04	81
9	(E)-2-Tetradecene	Hydrocarbon	11.7	1.53 ± 0.03	96
10	(E)-5-Octadecene	Hydrocarbon	14.2	1.50 ± 0.03	97
13	Methylhexadecanoate	Ester	18.9	3.35 ± 0.1	96
16	Methyl stearate	Ester	22.2	1.42 ± 0.03	94
19	Squalene	Terpene	27.2	5.44 ± 0.2	97

Note: There are other minor compounds whose NIST matching were <80%.

Table 4. The peak number, name of volatile compounds, their chemical class, retention time (RT), percentage peak area (mean±SD, n = 3) and matching of the identified compounds in the brown teff grain sample by GC-MS method from the n-hexane extract

Peak No.	Compound name	Chemical class	RT (min)	Peak area (%)	Matching (≥80%)
1	Furfural	Aldehyde	5.31	18.4 ± 0.9	87
3	2-[(Methylthio)methyl]furan	Furan	7.21	12.5 ± 0.6	97
4	5-Methyl-2-furancarboxaldehyde	Aldehyde	7.49	16.0 ± 0.8	94
5	2,2ʹ-Methylenebisfuran	Furan	8.48	2.61 ± 0.08	96
7	Benzeneacetaldehyde	Aldehyde	8.61	9.73 ± 0.4	94
9	2-(2-Furanylmethyl)-5-methylfuran	Furan	9.79	4.91 ± 0.2	96
13	1-(2-Furanylmethyl)-1 H-pyrrole	Pyrrole	10.5	4.83 ± 0.2	87
14	2,3-Dimethylphenol	Alcohol	10.9	1.99 ± 0.05	86
16	1-Tetradecene	Hydrocarbon	11.6	2.28 ± 0.07	99
17	4-Ethyl-2-methoxyphenol	Alcohol	12.0	2.83 ± 0.08	81
20	Cetene	Hydrocarbon	16.4	2.06 ± 0.06	96

Note: There are other minor compounds whose NIST matching were <80%.

Figure 1. The chromatogram of volatile compounds of white teff grain sample in dichloromethane extract

Figure 2. The chromatogram of volatile compounds of brown teff grain sample in dichloromethane extract

Figure 3. The chromatogram of volatile compounds of white teff grain sample in n-hexane extract

Figure 4. The chromatogram of volatile compounds of brown teff grain sample from n-hexane extract