Table 2 Volatile compounds Atlantic salmon stored at 75 MPa/25 °C and AP/5 °C during 30 days, and at AP/25 °C during 5 days.

From: Enhanced preservation of vacuum-packaged Atlantic salmon by hyperbaric storage at room temperature versus refrigeration

Volatile compounds

RT (min)

KI

Fresh fish

75 MPa/25 °C

AP/5 °C

AP/25 °C

0 days

6 days

15 days

30 days

5 days

15 days

30 days

5 days

Alcohols

Pent-1-en-3-ol

2.921

670

0.073 ± 0.006

0.081 ± 0.009

0.086 ± 0.047

0.031 ± 0.006

0.074 ± 0.027

0.060 ± 0.016

0.068 ± 0.005

nd

3-Methylbutan-1-ol

3.847

717

nd

nd

nd

nd

0.038 ± 0.011d

0.969 ± 0.066a

0.497 ± 0.022b

0.157 ± 0.074c

2-Methylbutan-1-ol

3.954

720

nd

nd

nd

nd

0.009 ± 0.006c

0.202 ± 0.030a

0.255 ± 0.058a

0.084 ± 0.027b

Butane-2,3-diol

5.913

779

nd

nd

nd

nd

0.065 ± 0.032b

0.145 ± 0.009a

0.090 ± 0.037ab

0.108 ± 0.044ab

Oct-1-en-3-ol

12.930

973

0.064 ± 0.063

0.078 ± 0.016

0.076 ± 0.038

0.039 ± 0.003

0.052 ± 0.019

0.057 ± 0.021

0.055 ± 0.004

nd

Phenylethyl alcohol

19.375

1108

nd

nd

nd

nd

0.014 ± 0.003c

0.228 ± 0.008a

0.136 ± 0.035b

0.222 ± 0.028a

Aldehydes

3-Methylbutanal

2.569

642

nd

nd

nd

0.022 ± 0.007b

0.021 ± 0.007b

0.095 ± 0.042a

0.072 ± 0.018a

nd

Hexanal

5.533

768

0.362 ± 0.123a

0.234 ± 0.043abc

0.164 ± 0.081bc

0.100 ± 0.034c

0.340 ± 0.075ab

0.248 ± 0.024abc

0.404 ± 0.062a

0.113 ± 0.002c

Hept-4-enal

9.305

893

0.059 ± 0.010a

0.046 ± 0.011ab

0.026 ± 0.007bc

0.012 ± 0.005c

0.044 ± 0.003ab

0.038 ± 0.004b

0.042 ± 0.010ab

nd

Heptanal

9.428

898

0.067 ± 0.035a

0.025 ± 0.008ab

0.034 ± 0.025ab

0.011 ± 0.006b

0.037 ± 0.008ab

0.051 ± 0.012ab

0.049 ± 0.013ab

nd

Benzaldehyde

11.778

951

0.060 ± 0.036b

0.052 ± 0.019b

0.060 ± 0.026ab

0.045 ± 0.002b

0.042 ± 0.026b

0.104 ± 0.034ab

0.133 ± 0.018a

0.076 ± 0.029ab

Octanal

14.104

1004

0.023 ± 0.006b

0.070 ± 0.019a

0.059 ± 0.025ab

0.023 ± 0.008b

0.046 ± 0.016ab

0.046 ± 0.017ab

0.078 ± 0.011a

nd

Hepta-2,4-dienal

14.420

1005

0.087 ± 0.021

0.062 ± 0.034

0.100 ± 0.072

nd

0.105 ± 0.012

0.098 ± 0.027

0.060 ± 0.022

nd

Phenylacetaldehyde

15.747

1032

nd

nd

nd

nd

0.024 ± 0.014c

1.363 ± 0.306a

0.483 ± 0.073b

0.310 ± 0.161bc

Nonanal

19.044

1101

0.029 ± 0.009

0.062 ± 0.014

0.087 ± 0.057

0.056 ± 0.014

0.064 ± 0.019

0.078 ± 0.025

0.065 ± 0.016

0.087 ± 0.012

Decanal

23.852

1200

0.019 ± 0.020

0.022 ± 0.008

0.022 ± 0.018

0.012 ± 0.007

0.019 ± 0.008

0.022 ± 0.007

0.011 ± 0.002

0.024 ± 0.012

Alkanes

Decane

13.961

1000

0.096 ± 0.026b

0.276 ± 0.090a

0.103 ± 0.047b

0.087 ± 0.038b

0.205 ± 0.030ab

0.157 ± 0.054ab

0.104 ± 0.017b

nd

Undecane

18.644

1093

0.120 ± 0.025

0.450 ± 0.156

0.246 ± 0.159

0.207 ± 0.060

0.291 ± 0.062

0.204 ± 0.059

0.136 ± 0.014

0.356 ± 0.245

Dodecane

23.313

1190

0.076 ± 0.013

0.293 ± 0.116

0.196 ± 0.116

0.199 ± 0.043

0.159 ± 0.038

0.111 ± 0.020

0.075 ± 0.009

0.239 ± 0.156

Tridecane

27.240

1290

0.039 ± 0.008

0.133 ± 0.057

0.088 ± 0.053

0.099 ± 0.020

0.066 ± 0.017

0.041 ± 0.001

0.028 ± 0.001

0.113 ± 0.076

Pentadecane

33.403

1496

0.097 ± 0.034c

0.060 ± 0.025c

0.069 ± 0.032c

0.055 ± 0.025c

0.101 ± 0.047c

0.134 ± 0.055bc

0.421 ± 0.079a

0.249 ± 0.114b

Heptadecane

37.830

1680

0.107 ± 0.065bcd

0.059 ± 0.033d

0.075 ± 0.056 cd

0.051 ± 0.028d

0.083 ± 0.044bcd

0.080 ± 0.012bc

0.088 ± 0.015b

0.148 ± 0.025a

2,6,10,14-Tetramethylpentadecane

38.335

1700

0.164 ± 0.037b

0.093 ± 0.003b

0.111 ± 0.050b

0.085 ± 0.006b

0.135 ± 0.043b

0.180 ± 0.032b

0.080 ± 0.009b

0.352 ± 0.062a

Esters

Ethyl acetate

2.256

616

0.025 ± 0.001bc

nd

nd

nd

0.127 ± 0.016bc

0.324 ± 0.113ab

0.325 ± 0.113ab

0.554 ± 0.279a

Ethyl 2-methylpropanoate

4.458

735

nd

nd

nd

nd

nd

nd

nd

0.560 ± 0.126

Ethyl 2-methylbutanoate

7.356

826

nd

nd

nd

nd

nd

nd

nd

0.866 ± 0.302

Ethyl 4-methylpentanoate

12.412

962

nd

nd

nd

nd

nd

nd

nd

2.815 ± 0.591

Ketones

Butan-2-one

2.141

607

nd

nd

nd

nd

0.021 ± 0.006b

0.019 ± 0.009b

0.021 ± 0.008b

1.312 ± 0.663a

Sulphur compounds

Dimethyl disulphide

4.098

724

nd

nd

nd

nd

nd

nd

nd

0.164 ± 0.023

  1. Different letters along each row denote significant differences (p < 0.05); absence of letters indicates not statistically significant differences. Values correspond to the peak area of each compound/peak area of internal standard ratio.
  2. KI experiment value of Kovats Index (KI).