Table 1. The percentage composition of fatty acids in mealworms extracted using n-hexane, ethyl acetate (EtOAc), ethanol (EtOH), and isopropanol (IPA)

Peak Formula Name of compounds EtOAc EtOH IPA n-Hexane
1 C10:1 Decanoic acid, methyl ester 0.02±0.003a 0.02±0.003a 0.02±0.00a 0.03±0.006a
2 C12:0 Dodecanoic acid, methyl ester 0.51±0.1ab 0.20±0.008c 0.32±0.14b 0.55±0.023a
3 C13:0 Tridecanoic acid, methyl ester 0.11±0.00a 0.26±0.13a 0.10±0.00a 0.13±0.003a
4 C14:1 Methyl myristoleate 0.43±0.003a 0.16±0.00b 0.36±0.03a 0.43±0.067a
5 C16:1 Methyl E-11-tetradecenoate 0.22±0.007b 0.10±0.006c 0.21±0.00b 0.26±0.007a
6 C16:1 Methyl Z-11-tetradecenoate 0.01±0.007b 0.02±0.003ab 0.02±0.00ab 0.04±0.003a
7 C14:0 Methyl tetradecanoate 7.13±0.053b 3.37±0.046d 6.42±0.003c 7.33±0.037a
8 C14:1 Tetradecanoic acid, 12-methyl-, methyl ester, (S)- 0.03±0.006a 0.02±0.009a 0.05±0.012a 0.04±0.013a
9 C16:1 7-Hexadecenoic acid, methyl ester, (E)- 0.05±0.003b 0.03±0.00c 0.05±0.00b 0.06±0.003a
10 C16:1 7-Hexadecenoic acid, methyl ester, (Z)- 0.02±0.007ab 0.01±0.003b 0.03±0.00ab 0.04±0.007a
11 C16:0 Pentadecanoic acid, methyl ester 0.13±0.017b 0.07±0.003c 0.15±0.00ab 0.18±0.007a
12 C16:2 7,10-Hexadecadienoic acid, methyl ester 0.37±0.003b 0.14±0.003c 0.34±0.00b 0.45±0.013a
13 C18:1 9-Hexadecenoic acid, methyl ester, (Z)- 1.77±0.03b 0.83±0.00d 1.67±0.00c 2.09±0.003a
14 C16:1 Methyl hexadec-9-enoate 3.01±0.007b 1.27±0.009d 2.78±0.00c 3.41±0.01a
15 C16:0 Hexadecanoic acid, methyl ester 22.66±0.14b 16.35±0.12d 21.13±0.00c 24.62±0.14a
16 C17:1 cis-10-Heptadecenoic acid, methyl ester 0.23±0.013b 0.07±0.012c 0.26±0.00ab 0.29±0.013a
17 C17:0 Heptadecanoic acid, methyl ester 0.13±0.013c 0.34±0.003a 0.19±0.003b 0.21±0.003b
18 C18:2 9,12-Octadecadienoic acid (Z,Z)-, methyl ester 24.70±0.25d 36.86±0.31a 27.93±0.08c 29.78±0.09b
19 C18:1 9-Octadecenoic acid (Z)-, methyl ester 35.10±0.09a 26.69±0.37c 32.22±0.00b 25.23±0.033d
20 C20:0 Methyl stearate 2.85±0.091c 9.06±0.084a 3.37±0.00b 3.27±0.07b
21 C18:1 6-Octadecenoic acid, methyl ester, (Z)- 0.01±0.00a 0.11±0.038a 0.09±0.077a 0.07±0.063a
22 C18:1 11-Octadecenoic acid, methyl ester 0.02±0.00b 0.16±0.052a 0.03±0.00b 0.04±0.00b
23 C19:1 cis-10-Nonadecenoic acid, methyl ester 0.06±0.003c 0.14±0.003b 0.23±0.00a 0.13±0.003b
24 C19:0 Nonadecanoic acid, methyl ester 0.02±0.003c 0.19±0.006a 0.06±0.00b 0.06±0.003b
25 C20:3 Methyl 5,11,14-eicosatrienoate 0.02±0.003b 0.11±0.009b 0.45±0.00a 0.43±0.63a
26 C20:1 cis-11-Eicosenoic acid, methyl ester 0.28±0.033b 3.41±0.68a 0.15±0.00b 0.11±0.05b
27 C20:1 Eicosanoic acid, methyl ester 0.11±0.00c 0.00±0.00d 1.38±0.00a 0.72±0.003b
SFA (%) 33.9 29.98 32.08 36.8
MUFA (%) 41.37 33.04 39.55 32.99
PUFA (%) 25.07 37.0 28.27 30.23
PUFA/SFA 0.73 1.23 0.88 0.82
The data is presented as means±SD, with a sample size of n=3.
Letters accompanying the means signify statistically significant differences (p<0.05) among the extraction solvents.
SFA, saturated fatty acids; MUFA, monounsaturated fatty acids; PUFA, polyunsaturated fatty acids.