揭示乳清咖啡冷咖啡的风味改善:特有的风味化合物和形成机制
Dan Zhao1, Yi Li1, Zuyan Duan1
1College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China.
Food chemistry
|September 10, 2025
概括
乳清冷咖啡 (Whey Cold Brew Coffee, WCB) 使用乳清而不是水来增强风味,具有坚果和焦糖的音调. 乳清蛋白稳定了风味化合物,改善了冷咖啡的体验.
科学领域:
- 食品科学 食品科学 食品科学
- 饮料技术 饮料技术
- 蛋白质化学 蛋白质化学
背景情况:
- 冷咖啡 (CB) 的味道可能是有限的.
- 乳清是一种未充分利用的乳制品副产品.
- 优化咖啡中的风味化合物是可取的.
研究的目的:
- 为了增强冷咖啡的风味,使用乳清.
- 了解乳清冷咖啡 (WCB) 中的风味形成机制.
- 为了研究乳清蛋白在风味稳定中的作用.
主要方法:
- 使用乳清提取物制备冷咖啡.
- 头部空间固相微提取气色谱-质谱 (HS-SPME-GC-MS) 用于风味分析.
- 气味活动值 (OAV) 分析.
- 感官评估. 感官评估.
- 光谱分析 (UV-Vis,CD) 和分子对接.
主要成果:
- 与CB相比,WCB显示 pyrazines, furan 和 ketone 的度明显更高.
- 发现的关键风味贡献者包括2,5-二甲基pyrazine和2,3-pentanedione.
- 对于坚果,巧克力和花/水果的音符,WCB获得了更高的感官分数.
- 乳清中的β-乳糖球蛋白 (β-LG) 通过键和疏水相互作用结合了风味化合物.
- 乳清蛋白结合增强了复杂的稳定性,并抑制了异味.
结论:
- 用乳清取代水显著增强冷咖啡的风味.
- 乳清蛋白相互作用对于调味化合物稳定和非调味抑制至关重要.
- 这项技术为高价值的乳清资源利用和冷酒创新提供了一种新的方法.
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