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. 2020 Jun 19;25(12):2826.
doi: 10.3390/molecules25122826.

High-CO2 Modified Atmosphere Packaging with Superchilling (-1.3 °C) Inhibit Biochemical and Flavor Changes in Turbot (Scophthalmus maximus) during Storage

Jun Mei  1   2   3   4 , Feng Liu  1 , Shiyuan Fang  1 , Weiqing Lan  1   2   3   4 , Jing Xie  1   2   3   4
Affiliations

High-CO2 Modified Atmosphere Packaging with Superchilling (-1.3 °C) Inhibit Biochemical and Flavor Changes in Turbot (Scophthalmus maximus) during Storage

Jun Mei et al. Molecules. .

Abstract

The effects of modified atmosphere packaging (MAP) in combination with superchilling (-1.3 °C) on the physicochemical properties, flavor retention, and organoleptic evaluation of turbot samples were investigated during 27 days storage. Results showed that high-CO2 packaging (70% or 60% CO2) combined with superchilling could reduce the productions of off-flavor compounds, including total volatile basic nitrogen (TVB-N) and ATP-related compounds. Twenty-four volatile organic compounds were determined by gas chromatography-mass spectrometry (GC/MS) during storage, including eight alcohols, 11 aldehydes, and five ketones. The relative content of off-odor volatiles, such as 1-octen-3-ol, 1-penten-3-ol, (E)-2-octenal, octanal, and 2,3-octanedione, was also reduced by high-CO2 packaging during superchilling storage. Further, 60% CO2/10% O2/30% N2 with superchilling (-1.3 °C) could retard the water migration on the basis of the water holding capacity, low field NMR, and MRI results, and maintain the quality of turbot according to organoleptic evaluation results during storage.

Keywords: modified atmosphere packaging; quality; shelf life; superchilling; turbot.

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Conflict of interest statement

These authors have declared no conflict of interest.

Figures

Figure 1
Figure 1
Changes in water holding capacity (WHC) (a), TVB-N value (b), TBA value (c) and K value (d) of samples under different treatments during storage period (AP: air packing; VP: vacuum packing; MAP1: 70% CO2/30% N2; MAP2: 60% CO2/10% O2/30% N2; MAP3: 50% CO2/15% O2/35% N2; MAP4: 55% CO2/5% O2/40% N2).
Figure 2
Figure 2
T2 relaxation time distribution curves of turbots under different treatments on the 0 (a), 15th (b) and 27th (c) day of the storage period (T21, bound water; T22, immobilized water; T23, free water; AP: air packing; VP: vacuum packing; MAP1:70% CO2/30% N2; MAP2: 60% CO2/10% O2/30% N2; MAP3: 50% CO2/15% O2/35% N2; MAP4: 55% CO2/5% O2/40% N2).
Figure 3
Figure 3
Results of magnetic resonance imaging (MRI) of samples under different treatments during storage period (AP: air packing; VP: vacuum packing; MAP1:70% CO2/30% N2; MAP2: 60% CO2/10% O2/30% N2; MAP3: 50% CO2/15% O2/35% N2; MAP4: 55% CO2/5% O2/40% N2).
Figure 4
Figure 4
Changes in total viable counts (TVC) of samples under different treatments during storage period (AP: air packing; VP: vacuum packing; MAP1:70% CO2/30% N2; MAP2: 60% CO2/10% O2/30% N2; MAP3: 50% CO2/15% O2/35% N2; MAP4: 55% CO2/5% O2/40% N2).
Figure 5
Figure 5
Organoleptic evaluation results of odor (A), color (B), mucus (C), elasticity (D) and tissue morphology (E) of turbot under different treatments during storage period(AP: air packing; VP: vacuum packing; MAP1: 70% CO2/30% N2; MAP2: 60% CO2/10% O2/30% N2; MAP3: 50% CO2/15% O2/35% N2; MAP4: 55% CO2/5% O2/40% N2).
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