真空辅助浸泡对陈粳米饭风味的影响  

Effect of Vacuum-Assisted Soaking on Flavor of Aged Japonica Rice

作　　者：王逸欢 夏书芹[1] 张晓鸣[1] 王兴伟 李晶 龚艳玲 WANG Yihuan;XIA Shuqin;ZHANG Xiaoming;WANG Xingwei;LI Jing;GONG Yanling(School of Food Science and Technology,Jiangnan University,Wuxi 214122,China;Foshan Shunde Midea Electric Appliance Manufacturing Co.,Ltd.,Foshan 528311,China)

机构地区：[1]江南大学食品学院,江苏无锡214122 [2]佛山市顺德区美的电热电器制造有限公司,广东佛山528311

出　　处：《食品与生物技术学报》2023年第6期13-19,共7页Journal of Food Science and Biotechnology

基　　金：国家重点研发计划项目(2016YFD0400801)。

摘　　要：电饭煲热处理可赋予米饭怡人的特征风味,但其在改善陈粳米饭的气味品质方面仍存在一定的局限。作者借助气相色谱-嗅闻-质谱和气味活性值确定了造成陈粳米饭不良气味的特征化合物。采用气-质联用对不同条件浸泡处理的陈粳米饭气味特性进行分析,并结合脂肪酶活力、游离脂肪酸组成、过氧化值和丙二醛质量分数的变化剖析真空辅助浸泡对陈粳米脂质氧化程度的影响。结果表明,采用50℃真空辅助浸泡处理10 min可以通过抑制米粒中脂肪酶的催化活性,调控脂质氧化的进程,使己醛、(E)-2-庚烯醛、壬烯醛、(E,E)-2,4-癸二烯醛等关键陈味物质的质量分数分别下降了12.4%、4.2%、100%、53.9%,显著改善了电饭煲蒸煮陈粳米饭的气味品质。Heat treatment in electric cookers can give rice pleasant characteristic flavors,but there are still some limitations in improving the odor quality of aged Japonica rice.The characteristic compounds causing the off-flavor of aged Japonica rice were determined by gas chromatography-olfactometry-mass spectrometry and odor activity value.Gas chromatography-mass spectrometry was used to analyze the odor characteristics of aged Japonica rice with different soaking treatments.The effect of vacuum-assisted soaking on lipid oxidation degree of aged Japonica rice was investigated by analyzing the changes of lipase activity,composition of free fatty acid,peroxide value,and malondialdehyde content.The resulTSshowed that vacuum-assisted soaking at 50℃for 10 min could regulate the process of lipid oxidation by inhibiting the catalytic activity of lipase in rice grains,and reduce the accumulated content of key aged flavor compounds such as hexanal,(E)-2-heptenal,nonanal and(E,E)-2,4-decadienal by 12.4%,4.2%,100%and 53.8%,respectively,significantly improving the odor quality of aged Japonica rice cooked with an electric rice cooker.

关 键 词：真空浸泡 陈粳米 溶氧量 脂质氧化 气味 

分 类 号：TS213.3[轻工技术与工程—粮食、油脂及植物蛋白工程]