摘要
植物油是生育酚、甾醇等活性物质的最主要的膳食来源之一,但现有的过度精炼的工艺造成了生育酚和甾醇的大量损失,大大降低了食用植物油的营养价值。随着人们对营养健康的日益关注,加上行业内对植物油适度精炼工艺的号召,需要提高精炼后植物油中生育酚、甾醇的保留量,但植物油中生育酚和甾醇的最低含量的确定缺乏基础研究依据。因此,本文分别利用Rancimat法和Schaal烘箱法比较了不同生育酚及甾醇含量的大豆油的氧化稳定性和贮藏稳定性的差异,结果表明,生育酚和甾醇能够显著提高大豆油贮藏过程中的稳定性,但并不是剂量越高效果越强。当大豆油中生育酚及甾醇分别保留至0.12%、0.35%时,大豆油的氧化稳定性最强;当大豆油中生育酚及甾醇分别保留至0.12%、1.29%时,大豆油的贮藏稳定性最佳。本研究结果为植物油适度精炼工艺中相应产品标准(草案)的制修定提供基础数据,为探究以营养物质含量高低作为植物油新分级指标之一的可行性提供借鉴。
The vegetable oil was one of the main dietary sources of tocopherol and sterol, however, the excessive refining technology caused a large loss of tocopherol and sterol, which greatly reduced the nutrition vegetable oil. As the increasing attention to nutrition and health, combined with the call of moderate refining existing value of , the re- tained dose of tocopherol and sterol in the vegetable oil after refining needed to be improved, however, determination of minimum content of tocopherol and sterol in the vegetable oil lacked fundamental research basis. Therefore, this paper contracted difference of the oxidation stability and storage stability of soybean oil with different contents of to- copherol and sterol by using the Rancimat method and Schaal oven method respectively. It was found that tocopherol and sterol could significantly improve the stability of soybean oil during storage, however, it did not mean the higher the dosage was, the stronger the effect was. When the retention content of tocopherol and sterol reached 0.12%, 0.35% and 0.12%, 1.29%, respectively, the soybean oil had the best oxidation stability and storage stability. This study provided an essential data for the making or revising of the product standard （draft） related to the moderate re- fining technology, and laid a theoretical foundation for the feasibility exploration of taking the content of nutrient as one of new classification indexes of vegetable oil.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2016年第11期69-73,共5页
Journal of the Chinese Cereals and Oils Association
基金
2013年粮食公益性行业科研专项(201313011-7)
中央级公益性科研院所基本科研业务费专项(ZX1403)
