## 3 Results and Discussion
### Determination of Volatile Substances
#### 3.2.2 Results of GC-MS Measured Volatile Substances in Hairtail Surimi
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Number**} & \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**CAS**} & \multicolumn{6}{c}{**Relative Content/\%**} \\ \cline{3-8}  & & & **Blank** & **0 h** & **1 h** & **3 h** & **5 h** \\ \hline
37 & Pentanoic acid, 3-methyl- & 000105-43-1 & nd & 2.84 & nd & nd & nd \\
38 & Octanoic acid & 000124-07-2 & nd & 1.67 & nd & nd & nd \\
39 & n-Hexadecanoic acid & 000057-10-3 & nd & 18.4 & 8.35 & 5.54 & nd \\
40 & 19,19-Dimethyl-eicosa-8,11-dienoic acid & 1000297-01-9 & nd & nd & 0.38 & nd & nd \\
41 & cis-5,8,11,14,17-Eicosapentaenoic acid & 010417-94-4 & 0.54 & nd & nd & nd & nd \\
42 & o-Xylene & 000059-57-6 & nd & 0.34 & nd & nd & nd \\
43 & p-Xylene & 000106-42-3 & 14.14 & nd & 2.28 & 0.51 & 4.28 \\
44 & Benzene, 1,3-dimethyl- & 000108-38-3 & nd & 1.49 & nd & 2.46 & nd \\
45 & Benzene, 1,1’- (oxydi-2,1-ethanediyl)bis[3-ethyl- & 055044-09-2 & nd & 2.44 & nd & nd & nd \\
46 & Benzene, 4-ethyl-1,2-dimethyl- & 000934-80-5 & nd & 4.51 & 1.24 & 2.74 & nd \\
47 & Benzene, 1-ethyl-2,3-dimethyl- & 000933-98-2 & nd & 1.47 & 2.56 & nd & 5.44 \\
48 & Benzene, 1-ethyl-3,5-dimethyl- & 000934-74-7 & nd & 1.21 & 2.03 & 1.89 & nd \\
49 & Benzene, 2-ethyl-1,3-dimethyl- & 0002870-04-4 & nd & 2.59 & nd & nd \\
50 & Benzene, 2-ethyl-1,4-dimethyl- & 001758-88-9 & nd & nd & nd & nd \\
51 & Benzene, 2,4-diethyl-1-methyl- & 001758-85-6 & nd & nd & 1.27 & nd & nd \\
52 & Benzene, 1,2,4,5-tetramethyl- & 000095-93-2 & nd & 9.63 & 11.48 & 17.22 & 10.62 \\
53 & Benzene, 1,2,3,5-tetramethyl- & 000527-53-7 & nd & 3.86 & nd & 6.41 & nd \\
54 & Benzene, 1,2,3,4-tetramethyl- & 000488-23-3 & nd & nd & 8.84 & nd & nd \\
55 & Toluene & 0001018-88-3 & nd & nd & 0.87 & nd & nd \\
56 & Benzene, 1,3-diethyl-5-methyl- & 002050-24-0 & nd & nd & 1.6 & 1.86 \\
57 & Benzene, 1-methyl-4-(2-propenyl)- & 003333-13-9 & nd & nd & nd & 1.24 & 1.09 \\
58 & Butanal, 3-methyl- & 000590-86-3 & nd & 0.53 & 2 & 1.87 & 2.14 \\
59 & Hexanal & 000066-25-1 & 9.25 & 3.97 & 3.79 & 4.58 & 5.66 \\
60 & Benzaldehyde, 2,4-dimethyl- & 015764-16-6 & nd & 0.69 & nd & nd & nd \\
61 & Benzaldehyde & 000100-52-7 & 0.64 & 0.48 & 1.5 & 0.98 & 1.33 \\
62 & Nonanal & 000124-19-6 & 1.66 & nd & nd & nd & 0.71 \\
63 & Pentanal & 000110-62-3 & 1.05 & nd & nd & nd & nd \\
64 & Heptanal & 000111-71-7 & 4.42 & nd & nd & nd & nd \\
65 & 1,3-Cyclopentadiene, 1,2,3,4-tetramethyl-5-methylene- & 076089-59-3 & nd & 3.09 & 2.11 & 5.17 & nd \\
66 & Squalene & 000111-02-4 & nd & 12.09 & nd & nd & nd \\
67 & 2-Pentene & 000109-68-2 & nd & nd & 4.42 & nd & nd \\
68 & 1,3,6-Octadiene, (E,E)- & 022038-69-3 & nd & nd & 0.49 & nd & nd \\
69 & 1-Methylcycloheptene & 055308-08-8 & nd & nd & nd & 0.5 & nd \\
70 & 1,7-Octadiene, 3,6-dimethyl- & 003382-59-0 & nd & nd & nd & nd & 0.94 \\
71 & 1,4-Octadiene & 005675-25-2 & nd & nd & nd & nd & 0.57 \\
72 & 2,4-Octadiene & 013643-08-8 & 3.86 & nd & nd & nd & nd \\
73 & 3,5-Octadiene, (Z,Z)- & 007348-80-3 & 1.47 & nd & nd & nd & nd \\
74 & Cyclocoocoene, 3-phenyl- & 002213-60-7 & 0.85 & nd & nd & nd & nd \\
75 & 1,4-Cyclocadiene & 001073-07-0 & 0.52 & nd & nd & nd & nd \\
76 & 2-Hexene, 3,5,5-trimethyl- & 024656-76-8 & 3.85 & nd & nd & nd & nd \\
77 & 4-Aminophenol, N,O-bis(pentafluoropropionyl)- & 1000364-80-0 & nd & 0.12 & nd & nd & nd \\
78 & 3-Aminophenol, N,O-bis(pentafluoropropionyl)- & 1000364-81-6 & nd & 0.81 & nd & nd & nd \\
79 & Phenol & 000108-95-2 & 2.42 & 0.93 & 1.25 & 1.19 & 1.51 \\
80 & p-Cresol & 000106-44-5 & 0.48 & nd & nd & nd & nd \\
81 & Silane, [[4-1,2-bis(trimethylsilyl)](oxy]](ethyl)-1,2- & 056114-62-6 & nd & 0.48 & 0.41 & nd & 0.49 \\  & phenylene[bis(oxy)]bis[trimethyl- & 001072-05-5 & nd & 0.75 & nd & nd & nd \\
82 & Heptacane, 2,6-dimethyl- & 0053966-43-1 & nd & 0.46 & nd & nd & nd \\
83 & 3,8-Dioxatricyclo[5.1.0.0(2,4)]octane, 4-ethenyl- & 1000366-57-5 & nd & 1.14 & 1.52 & nd & nd \\
84 & Tris(tert-butyldimethylsilyloxy)arsane & 017928-28-8 & nd & nd & 1.77 & 1.76 & nd \\
85 & Methyltris(trimethylsilyloxy)silane & 000543-59-9 & nd & nd & 5.6 & nd \\
86 & Pentane, 1-chloro- & 00053674-21-6 & nd & nd & 0.79 & nd \\
87 & Silane, chloroethyl- & 0003604-41-8 & 2.39 & nd & nd & nd & nd \\
88 & 1-Methyl-2-methylencyclohexane & 002808-75-5 & 1.42 & nd & nd & nd & nd \\
90 & Heptadecane, 2,6-dimethyl- & 054105-67-8 & 2.36 & nd & nd & nd & nd \\
91 & 7-Oxabicyclo[4.1.0]heptane, 3-oxiranyl- & 000106-87-6 & 1.52 & nd & nd & nd \\
92 & Heptadecane & 000629-78-7 & 0.86 & nd & nd & nd & nd \\ \hline \hline \end{tabular}
\end{table}