. 2014 Feb 28;7:30. doi: 10.1186/1754-6834-7-30

Table 5.

Gas chromatography-mass spectroscopy analysis of bio-oil products of duckweed, azolla and microalgae pyrolysis

Retention time, minutes	Duckweed	Azolla (green)	Azolla (red)	Microalgae
4.3			Toluene	Toluene
4.9			3-Methyl furan and/or 3-Cyclopenten-1,2 diol
5.2			Tetrahydro-4H-pyran-4-ol
5.5			4-Cyclohexene-1,2-diol
5.58				2-Methyl-1H-Pyrrole
5.72		2,4,5-Trimethyl 1H-imidazole
5.8			1,2-Diemthyl-2-pyrroline
6.18				Piperidine
6.33		Phenol	Phenol	Phenol
6.72	2,3-Dimethyl-1H-Pyrrole			2,3-Dimethyl-1H-Pyrrole
6.83				4-Ethyl-2-methyl-1H- pyrrole
7.38	2-Methyl phenol	2-Methyl phenol	2-Methyl phenol
7.9	3-Methyl phenol	3-Methyl phenol	3-Methyl phenol
8.3				3-Ethyl-2,5-dimethyl-1H-pyrrole
8.38				3-Ethyl-2,4-dimethyl-1H-pyrrole
8.77	4-Methyl phenol
9.28			Dodecane
9.33				2-Isopropylpyrazine
9.43				3-Ethyl-2,4,5-Trimethyl-1H-Pyrrole
9.67	4-Ethyl phenol
10.13	2-Ethyl phenol
10.67		Tridecane	Tridecane
10.83				Indole
11.77	Indolizine	Indolizine	Indolizine
11.98		Tetradecane	Tetradecane	Tetradecane
12.83	3-Methyl Indolizine			3-Methyl Indolizine
13.23		Pentadecane	Pentadecane	Pentadecane
13.37	4-Methyl 1H-indole
14.43		Hexadecane	Hexadecane	Hexadecane
15.28				6,9-Heptadecadiene
15.37				1,15-Pentadecanediol
15.38				8-Heptadecane
15.57		Heptadecane	Heptadecane	Heptadecane
15.93	3,7,11,15-Tetramethyl-2-hexadecene	3,7,11,15-Tetramethyl-2-hexadecene	3,7,11,15-Tetramethyl-2-hexadecene	3,7,11,15-Tetramethyl-2-hexadecene
16.65		Octadecane	Octadecane
17.1 to 17.55	Isomers of 3,7,11,15-Tetramethyl-2-hexadecen-1-ol (phytol)	Various isomers of 3,7,11,15-Tetramethyl-2-hexadecen-1-ol (phytol)	Various isomers of 3,7,11,15-Tetramethyl-2-hexadecen-1-ol (phytol)	Various isomers of 3,7,11,15-Tetramethyl-2-hexadecen-1-ol (phytol)
17.8				Nonadecane
18.25		Palmitoleic acid	Palmitoleic acid
18.65		Eicosane (C₂₀)
19.58		Heneicosane (C₂₁)
19.75				Linolenic acid