水平对咖啡中关键芳香活性化合物的发展的影响
Andrea M Obando1, Jorge G Figueroa1
1Departamento de Química, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Loja 1101608, Ecuador.
Molecules (Basel, Switzerland)
|October 16, 2024
概括
咖啡发烧显著影响香味. 根据SCA标准,中等烤肉 (RL55) 提供令人愉快的音色,而极深烤肉 (RL25) 则产生不良的燃烧和硫气味.
科学领域:
- 食品化学 食品化学
- 感官科学 感官科学
- 分析化学 分析化学
背景情况:
- 咖啡的感官特征主要是在烤制过程中形成的.
- 关键的芳香活性化合物显著影响咖啡的整体芳香特征.
- 了解烤水平对这些化合物的影响对于质量控制至关重要.
研究的目的:
- 为了研究不同咖啡水平对关键芳香活性化合物的形成的影响.
- 为了将特定的烤水平与独特的香味配置文件相关联.
- 根据特种咖啡协会 (SCA) 的烤标准,识别关键的气味化合物.
主要方法:
- 咖啡豆被烤成四个不同的水平:非常轻 (RL85),轻 (RL75),中等 (RL55) 和极深 (RL25),遵循SCA指南.
- 固相微提取 (SPME) 用于化合物提取.
- 气相色谱- Olfactometry (GC-O) 和气相色谱-质谱 (GC-MS) 用于嗅觉评估和化合物识别.
主要成果:
- 共有74种化合物被确定,其中25种被归类为芳香活性.
- 非常轻的 (RL85) 和轻的 (RL75) 烤肉呈现出类似的芳香特征.
- 中等烤肉 (RL55) 呈现了可取的音色,如甜,烤和焦糖.
- 极其深色烤肉 (RL25) 的特点是负面的属性,如燃烧,腐烂和硫气味.
结论:
- 烤水平是咖啡关键芳香活性化合物和整体感官特征的关键决定因素.
- 特定的烤水平,特别是中等水平 (RL55),产生了理想的芳香品质,而极端深 (RL25) 则导致异常.
- 这项研究首次确定了与SCA烤标准相关的关键气味化合物,为咖啡行业提供了宝贵的见解.
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