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Xu L, Wu G, Zhang Y, Wang Q, Zhao C, Zhang H, Jin Q, Wang X. Evaluation of glycerol core aldehydes formation in edible oils under restaurant deep frying. Food Res Int 2020; 137:109696. [PMID: 33233270 DOI: 10.1016/j.foodres.2020.109696] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/30/2020] [Accepted: 09/06/2020] [Indexed: 01/28/2023]
Abstract
Glycerol core aldehydes (GCAs) are potentially toxic lipid oxidation products characterized by aldehydic acids bonded to glycerol via acyl groups. This study investigated the profile and change of GCAs in rapeseed oil (RO), high-oleic sunflower oil (HOSO) and cottonseed oil (CO) after frying chicken nuggets (CNs), fish nuggets (FNs) and French fries (FFs) for 60 h in real restaurant frying systems. Three GCAs (8-oxo, 9-oxo, and 10-oxo-8) were identified, with the GCAs (9-oxo) accounting for the highest value (60%), followed by GCAs (10-oxo-8) and GCAs (8-oxo). The total GCAs increased from 1.12 to 2.02 mg/g with frying time from 0 to 60 h in RO used for frying FNs. The FN frying systems produced the largest amount of GCAs, whereas the FF frying systems produced the least. RO contained more GCAs than CO and HOSO owing to its higher unsaturated fatty acid content (91.81%). Furthermore, the GCAs showed a high correlation with polymerized and oxidized products, indicating that the formation of GCAs were related to the oxidative stability of oils. These results may provide insight into the formation of GCAs and their control during frying.
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Affiliation(s)
- Lirong Xu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Gangcheng Wu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Yiren Zhang
- Department of Chemistry, School of Physical Science, University of Liverpool, Cambridge Court, Liverpool, UK
| | - Qiaojun Wang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Chenwei Zhao
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Hui Zhang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Qingzhe Jin
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China
| | - Xingguo Wang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, Jiangsu 214122, PR China.
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