CN107164088A - 一种牡丹籽油复合天然抗氧化剂 - Google Patents
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
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Abstract
本发明公开了一种牡丹籽油复合天然抗氧化剂，该复合天然抗氧化剂由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为(0.5～2.5):(0.5～2.5):1组成。本发明通过将茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯复配，三者之间产生了明显的协同促进作用，添加到牡丹籽油中抗氧化效果显著高于纯单一组分，且抗氧化效果优于TBHQ，显著高于BHA、BHT和其他天然抗氧化剂。本发明复合天然抗氧化剂绿色无毒，具有良好的热稳定性和显著的抗氧化效果，可用于牡丹籽油的抗氧化。
Description
技术领域
本发明涉及一种牡丹籽油复合天然抗氧化剂。
背景技术
牡丹籽油富含不饱和脂肪酸，其含量高达90％以上，多不饱和脂肪酸α-亚麻酸超过40％，其营养价值远超过橄榄油、茶籽油、核桃油。因此，2011年牡丹籽油被国家卫生部批准为新能源食品，这为大力发展木本油料作物和解决我国粮油危机具有重要意义。但由于其高不饱和程度，在长期存储过程中，易受光、热、氧气、水分等因素的影响而氧化，生成过氧化物及醛、酮等化合物，导致油脂变色、变味，降低食用价值，甚至危害身体健康。为了抑制牡丹籽油储藏过程中氧化变质，延长储存时间，最常用的方法就是添加抗氧化剂。
油脂抗氧化剂分为人工合成抗氧化剂和天然抗氧化剂。人工合成抗氧化剂，如丁基羟基茴香醚(BHA)、二丁基羟基甲苯(BHT)、特丁基对苯二酚(TBHQ)等，具有显著的抗氧化作用，但其安全性一直是广泛关注的问题。有研究证明，高剂量的BHA、BHT、TBHQ具有致癌作用，因此很多国家限制了对人工合成抗氧化剂的使用，美国、欧盟等禁止使用合成抗氧化剂。天然抗氧化剂直接提取自植物，因具有安全性高、抗氧化效果好并具有一定保健作用等特点而备受青睐。近二十年来对天然抗氧化和人工合成抗氧剂比较研究也证实了天然抗氧化剂的潜在优势，并有取代人工合成抗氧化剂的趋势。
发明内容
本发明所要解决的技术问题在于提供一种具有良好的热稳定性、绿色无毒且具有显著的抗氧化效果的牡丹籽油复合天然抗氧化剂。
解决上述技术问题所采用的技术方案是：该牡丹籽油复合天然抗氧化剂由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为(0.5～2.5):(0.5～2.5):1组成。
本发明复合天然抗氧化剂优选由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为(1～2):(1～2):1组成。
本发明复合天然抗氧化剂进一步优选由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为2:2:1组成。
本发明复合天然抗氧化剂用于牡丹籽油的抗氧化时，其中抗坏血酸棕榈酸酯的添加量为牡丹籽油质量的0.01％，茶多酚的添加量为牡丹籽油质量的0.005％～0.025％、竹叶抗氧化剂的添加量为牡丹籽油质量的0.005％～0.025％。
本发明复合天然抗氧化剂中的天然抗氧化剂茶多酚是一种多酚类活性物质，对人体健康有重要生理作用，如清除自由基、降血压、降血脂、降血糖等安全性高，具有很好的热稳定性，绿色无污染，且抗氧化效果好，是人工合成抗氧化剂的理想替代品。竹叶抗氧化剂不仅安全性高、不带异味、价格低廉，又兼具天然、营养、抗菌、抑菌、除臭、增香等多功能性。增效剂抗坏血酸棕榈酸酯是世界卫生组织(WHO)食品添加剂委员会评定为具有营养性、无毒、高效、使用安全的食品添加剂，在油脂中常用作增效剂，用于食品可起到抗氧化、食品(油脂)护色、营养强化等功效。
本发明通过将茶多酚、竹叶抗氧化剂以及增效剂抗坏血酸棕榈酸酯复配，三者之间产生了明显的协同促进作用，添加到牡丹籽油中抗氧化效果显著高于纯单一组分，且抗氧化效果优于TBHQ，显著高于BHA、BHT和其他天然抗氧化剂。
本发明复合天然抗氧化剂绿色无毒，具有良好的热稳定性和显著的抗氧化效果，可用于牡丹籽油的抗氧化。
具体实施方式
下面结合实施例对本发明进一步详细说明，但本发明的保护范围不仅限于这些实施例。
实施例1
将200mg茶多酚、200mg竹叶抗氧化剂、100mg抗坏血酸棕榈酸酯混合均匀，得到牡丹籽油复合天然抗氧化剂。
实施例2
将100mg茶多酚、100mg竹叶抗氧化剂、100mg抗坏血酸棕榈酸酯混合均匀，得到牡丹籽油复合天然抗氧化剂。
实施例3
将50mg茶多酚、250mg竹叶抗氧化剂、100mg抗坏血酸棕榈酸酯混合均匀，得到牡丹籽油复合天然抗氧化剂。
实施例4
将250mg茶多酚、50mg竹叶抗氧化剂、100mg抗坏血酸棕榈酸酯混合均匀，得到牡丹籽油复合天然抗氧化剂。
为了证明本发明的有益效果，发明人分别向牡丹籽油中添加实施例1和实施例2的复合天然抗氧化剂，采用Schaal烘箱法，将其放置于60±1℃烘箱中，一周后测定其过氧化值，过氧化值的测定参照GB/T-5538 2005，以过氧化值作为抗氧化效果的评价标准，对本发明复合天然抗氧化剂的抗氧化性能进行评价，并与纯单一成分的天然抗氧化剂茶多酚(TP)、竹叶抗氧化剂(AOB)，纯单一成分的人工抗氧化剂BHA、BHT、TBHQ，以及增效剂抗坏血酸棕榈酸酯(AP)和柠檬酸(CA)复配后的复合抗氧化剂的抗氧化性能进行比较，同时与不添加任何抗氧化的牡丹籽油做空白对照，试验结果如表1所示。
表1不同抗氧化剂的抗氧化效果
注：表中单一成分的添加量均是发明人通过实验确定的最佳抗氧化效果对应的添加量，其中0.01％TP+0.01％PAE+0.01％AP表示茶多酚的添加量为牡丹籽油质量的0.01％、竹叶抗氧化剂的添加量为牡丹籽油质量的0.01％、抗坏血酸棕榈酸酯的添加量为牡丹籽油质量的0.01％，其他抗氧化剂表示的含义与其相同。
由表1可见，牡丹籽油中添加单一天然抗氧化剂TP、AOB及单一人工抗氧化剂TBHQ、BHA、BHT的抗氧化效果均显著低于本发明实施例1和2的复合天然抗氧化剂，且本发明的复合天然抗氧化剂的抗氧化效果也明显优于TP与AOB、CA三者复配的抗氧化剂。
Claims (3)
1.一种牡丹籽油复合天然抗氧化剂，其特征在于：该复合天然抗氧化剂由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为(0.5～2.5):(0.5～2.5):1组成。
2.根据权利要求1所述的牡丹籽油复合天然抗氧化剂，其特征在于：该复合天然抗氧化剂由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为(1～2):(1～2):1组成。
3.根据权利要求1所述的牡丹籽油复合天然抗氧化剂，其特征在于：该复合天然抗氧化剂由茶多酚、竹叶抗氧化剂、抗坏血酸棕榈酸酯按质量比为2:2:1组成。
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| CN108967561A (zh) * | 2018-06-25 | 2018-12-11 | 西北农林科技大学 | 一种耐储藏的牡丹籽油和元宝枫油调和油 |
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