Evaluation of the Oxidative Stability of Diacylglycerol-Enriched Soybean Oil and Palm Olein Under Rancimat-Accelerated Oxidation Conditions |
| |
Authors: | Yong Wang Mouming Zhao Shuze Tang Keke Song Xue Han Shiyi Ou |
| |
Affiliation: | (1) College of Light Industry and Food Science, South China University of Technology, Wushan Rd. 381, 510641 Guangzhou, China;(2) Department of Food Science and Engineering, Jinan University, 510632 Guangzhou, China; |
| |
Abstract: | The oxidative stability of diacylglycerol (DAG)-enriched soybean oil and palm olein produced by partial hydrolysis using phospholipase
A1 (Lecitase Ultra) and molecular distillation was investigated at 110 °C by the Rancimat method with and without addition
of synthetic antioxidants. Compared with triacylglycerol oils, the DAG-enriched oils displayed lower oxidative stability due
to a higher content of unsaturated fatty acids and a lower level of tocopherols. With the addition (50–200 mg/kg) of tert-butylhydroquinone (TBHQ) or ascorbyl palmitate (AP), the oxidative stability indicated by induction period (IP) of these
DAG-enriched oils under the Rancimat conditions was improved. The IP of the diacylglycerol-enriched soybean oil increased
from 4.21 ± 0.09 to 12.64 ± 0.42 h when 200 mg/kg of TBHQ was added, whereas the IP of the diacylglycerol-enriched palm olein
increased from 5.35 ± 0.21 to 16.24 ± 0.55 h when the same level of AP was added. Addition of TBHQ, alone and in combination
with AP resulted in a significant (p ≤ 0.05) increase in oxidative stability of diacylglycerol-enriched soybean oil. AP had a positive synergistic effect when
used with TBHQ. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|