## 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} \hline \hline \multirow{2}{*}{**Number**} & \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**CAS**} & \multicolumn{5}{c}{**Relative Content\%**} \\ \cline{3-7}  & & & **Blank** & **0 h** & **1 h** & **3 h** & **5 h** \\ \hline
93 & 3-Hexanone & 000589-38-8 & nd & nd & 0.88 & nd & 1.22 \\
94 & 2-Hexanone & 000591-78-6 & nd & nd & nd & 0.84 & nd \\
95 & 2H-1,4-Benzodiazep-2-one, & 055299-24-6 & nd & nd & 0.82 & nd & nd \\
96 & 1(3H)-Jenbozofuranone, & 001552-42-7 & nd & nd & 0.24 & nd & nd \\
97 & 2-Butanone & 000078-93-3 & nd & nd & nd & nd & 1.4 \\
98 & 2-Nonanone & 000821-55-6 & 0.71 & nd & nd & nd & 0.51 \\
99 & 3-Octanone, 2-methyl- & 000923-28-4 & 0.48 & nd & nd & nd & nd \\
100 & 2-Undecanone & 000112-12-9 & 0.84 & nd & nd & nd & nd \\
101 & 16-Methyl-heptadecane-1,2-diol, trimethylsilyl ether & 1000336-70-6 & nd & 0.28 & nd & nd & nd \\
102 & Octaethylene glycolomododecyl ether & 003055-98-9 & nd & 1.44 & nd & nd & nd \\
103 & 2,5-Dihydroxyacetophenone, bis(trimethylsilyl) ether & 1000352-83-7 & 1.22 & nd & nd & 2.1 & nd \\
104 & 4-(2-Acetylamino-1-(trimethylsilyloxy)ethyl)phenol & 1000373-43-5 & 1.26 & nd & nd & nd & nd \\
105 & Benzamide, N-[7-(1-hydroxypropyl)-2,3-dihydrobenzo[1,4]dioxin-6-yll]-4-methyl- & 1000316-96-2 & nd & 0.39 & nd & nd & nd \\
106 & Hydrazinecarbothioamide, N-ethyl- & 013431-34-0 & nd & 0.61 & nd & nd & nd \\
107 & Acetamide, 2-(2-hydroxyethoxy)- & 000123-85-3 & nd & 0.72 & nd & 1 & nd \\
108 & Acetamide, N-(4-imidazo[1,2-alpyrimidin-2-ylphenyl)-2-methoxy-109 & 1000338-044-3 & nd & 0.69 & nd & nd & nd \\
109 & n-Hexylmethylamine & 035161-70-7 & nd & nd & nd & nd & 1.16 \\
110 & N,N\({}^{\prime}\),N\({}^{\prime\prime}\)-Methylustriformamide & 004747-33-8 & nd & nd & nd & nd & 1.06 \\
111 & 4-Amino-5-imidazole carboxamide,N,N,O- tris(trimethylsilyl)- & 1000079-30-4 & nd & nd & nd & nd & 0.38 \\
112 & Benzanamine, 4-bromo-3-chloro-N-(4-methylthiobenzylydene)- & 314283-74-4 & 1.4 & nd & nd & nd & nd \\
113 & 000527-84-4 & nd & 0.57 & 5.17 & nd & nd \\
114 & Furan, 2-ethyl- & 003208-16-0 & 1.31 & nd & 0.58 & 0.66 & \\ Furo[2\({}^{\prime}\),3\({}^{\prime}\),4,5]thiazol0,3[2,-gl]purine-8-methanol, & 016667-76-8 & nd & nd & 1.13 & nd & nd \\
115 & 4-amino-6.alpha,7,8,9a-tetrahydroo-7-hydroxy-, & 016667-76-8 & nd & nd & 1.13 & nd & nd \\
16a & Benzofuran, 2,3-dihydro-2-methyl- & 001746-11-8 & 0.54 & nd & nd & nd & nd \\
117 & 5-(Cyano-(3,4-dimethyl)-5-oxo-1,5-dihydro-pyrrol-2-ylidene)-methyl]-2,3,3-trimethyl-3,4-dihydro-2H-pyrrole-2-carbonitrile & 1000186-14-3 & nd & 1.31 & nd & nd & nd \\
118 & 7H-Dibenzo(a,g)carbazole & 000207-84-1 & nd & 0.37 & nd & nd & nd \\
119 & 1-(6-Methyl-benzothiazol-2-yl)-3-(4-methyl-benzoyl)-thiourea & 131120-14-4 & nd & 1.17 & nd & 0.34 & 0.53 \\
120 & m-Tolualdehyde, thioisemicarbazone & 005706-82-1 & 1.93 & nd & nd & nd & nd \\
121 & methoxy-phenyl-Oxime & 1000222-86-6 & 3.42 & 2.13 & 2.95 & 2.49 & 3.25 \\
122 & Naphthalene & 000091-20-3 & 1.73 & 1.53 & 3.19 & 3.4 & 3.01 \\
123 & Naphthalene, 2-methyl- & 000091-57-6 & nd & 0.66 & nd & nd & nd \\
124 & 1H-Indene, 1-methylene & 002471-84-3 & nd & 1.85 & nd & nd & nd \\
125 & 1H-Indene, 2,3-dihydro-4-methyl- & 000824-22-6 & nd & nd & 0.99 & nd & nd & nd \\
126 & Oxazole, 2,5-dihydro-5-(4-methylphenyl)-4-phenyl- & 036879-73-9 & nd & 0.78 & nd & nd & nd \\
127 & 2-Mercapto-4-phenylthiazolole & 002103-88-0 & nd & nd & 0.83 & nd & 1.02 \\
128 & 13H-Dibenzo[a,i]carbazole & 000239-64-5 & nd & nd & nd & 1.57 & nd \\ \multirow{2}{*}{beta.-D-Xylo-Hexopyranosal-4-ulose, methyl 2,3,6-tri-O-methyl-, (2,4-dinitrophenyl)hydrazine} & 041545-25-9 & nd & 0.45 & nd & nd & nd \\
130 & Pyrazolol[1,5-alpyrimidine, 2,7-dimethyl-5-phenyl- & 1000267-29-6 & nd & 0.9 & nd & nd & nd \\
131 & Azulene & 000275-51-4 & nd & nd & 0.86 & nd & nd \\
132 & Octanoic acid, silver(1+) & 024927-67-1 & nd & nd & 0.61 & nd & nd \\
133 & 3-Phenylindole & 001504-16-1 & nd & nd & 0.92 & nd \\
134 & 2-Methyl-7-phenylindole & 001140-08-5 & nd & nd & nd & 1.5 \\
135 & Methyl d-glycero-beta.-d-gulo-heptoside & 1000130-15-2 & nd & nd & nd & 0.61 & nd \\
136 & 2-Hydroazino-4,6-dimethylpyrimidine ditms peak 2 & 1000332-01-7 & nd & nd & nd & 1.56 \\
137 & 4H-3,1-Benzoxazine, & 1000327-27-7 & nd & nd & nd & nd & 1.09 \\
138 & N-(Trifluoroacetyl)-O\(\alpha^{\prime}\),(7,0,0)\({}^{\prime\prime}\)-tris(trimethylsilyl)norepinephrinephrine & 1000072-26-3 & 0.39 & nd & nd & nd & nd \\ \hline \hline \end{tabular}
\end{table}