Retention time (min) Possible Formula Possible chemical structure C. vulgaris C. reinhardtii C. debaryana
AT24
15.2 C13H26O2 Dadecanoic acid, methyl ester - - +
17.6 C15H30O2 Methyl tetradecanoate - - +
18.3 C16H32O2 Tetradecanoic acid, 12-methyl-methyl ester - - +
19.4 C17H30O2 7,10-Hexadecandienoic acid, methyl ester - - +
19.7 C17H34O2 Hexadecanoic acid, methyl ester + + +
20.3 C18H36O2 Hexadecanoic acid, 15-methyl-methyl ester - - +
21.3 C19H34O2 Linoleic acid, methyl ester + + +
21.4 C19H32O2 Linolenic acid, methyl ester + + +
21.6 C19H38O2 Octadecanoic acid, methyl ester + + +
+: present, -: not detectable
Table 5: GC/MS analysis and chemical identification of microalgal oils.