在热处理过程中,从脂中获得和不和脂肪分量的脂质氧化和风味变化
Dong Han1, Siyang Deng1,2, Hang Wang1
1Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China. zhangchunhui@caas.cn.
Food & function
|June 29, 2023
概括
加热肉脂肪分数会改变它们的氧化特性和风味特征. 在热处理后,不和脂肪分量 (USFF) 与和脂肪分量 (SFF) 相比,产生更易挥发的化合物和独特的风味.
科学领域:
- 食品化学 食品化学
- 脂质氧化作用 脂质氧化作用
- 味道分析 味道分析
背景情况:
- 肉脂肪含有丰富的脂肪酸 (FA),使其易受脂质氧化和挥发性化合物形成的影响.
- 了解不同肉脂肪分量的氧化稳定性和风味变化对于食品加工至关重要.
研究的目的:
- 为了研究脂的和脂肪分数 (SFF) 和不和脂肪分数 (USFF) 的氧化特性和风味变化.
- 为了确定加热时间对这些脂肪分数中的FA和挥发性化合物的影响.
主要方法:
- 将肉脂肪分成和 (SFF) 和不和 (USFF) 部分.
- 在140°C的温度下1个小时和2个小时进行分量的热处理.
- 脂肪酸 (FA) 和挥发性化合物的分析使用气色谱-质谱法 (GC-MS) 和GC × GC-ToFMS.
- 统计分析包括主要组件分析 (PCA) 和集群分析 (CA).
主要成果:
- 与SFF相比,USFF含有更高的不和脂肪酸 (UFA) 和更低的和脂肪酸 (SFAs).
- 加热增加了两个分数中的和脂肪酸与不和脂肪酸 (SFA/UFA) 的比率,产生了更多的化物,酒精,和乳.
- 与SFF相比,USFF的气味活性值显著高于SFF,这表明对味道的贡献更大.
- 相关性分析将特定的UFA (C18:2 ω6,C18:3 ω6,C18:3 ω3) 与关键的挥发性风味化合物联系起来.
结论:
- 肉脂肪分量的和度在热加工过程中显著影响其氧化稳定性和风味特征.
- 与SFF相比,USFF更容易氧化,但对风味的发展有更大的贡献.
- 特定的UFA是重要的挥发性化合物的前体,这些化合物决定了加热的肉脂肪的味道.
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