Objective To study the volatile compounds produced by atmospheric cold plasma (AP) treatment on the crude fat of Trachinotus ovatus during storage at 4 ℃, and characterize and analyze them. Methods The volatile organic compounds in the crude fat of Trachinotus ovatus after AP treatment during storage at 4 ℃ were qualitatively and quantitatively analyzed by electronic-nose and gas chromatography-mass spectrometry (GC-MS), and the taste substances of crude fat of Trachinotus ovatus were detected by electronic tongue. Results The types and content of alcohols and acids detected in the AP treatment group were low. The odor activity values showed that isobutyraldehyde, butyl hydroxytoluene, (Z)-3-phenylacrolein, cinnamyl acetate and dibutyl phthalate were the main volatile compounds in the fresh group, AP treatment group and storage control group. The electronic-nose radar map showed that the sensor response of the AP treatment group was weaker than the other two. Conclusion AP treatment can effectively protect the flavor stability of food during storage at 4 ℃. AP treatment group can bring special volatile compounds to the crude fat of Trachinotus ovatus, and slow down the rate of lipid oxidation during storage at 4 ℃. This research is helpful to explore the application of AP treatment in aquatic products.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |