在葡萄酒中同时确定乙醇和甲醇,使用FTIR和PLS回归
Vasiliki Thanasi1,2, Ilda Caldeira3,4, Luís Santos5
1LEAF-Linking Landscape, Environment, Agriculture and Food-Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
Foods (Basel, Switzerland)
|September 28, 2024
概括
福利埃变换红外光谱法 (FTIR) 可以量化葡萄酒中的乙醇和甲醇. 虽然该方法对于乙醇是准确的,但对于质量控制中的甲醇量化,该方法需要改进.
科学领域:
- 分析化学 分析化学
- 食品科学 食品科学 食品科学
- 频谱学是一种光谱学.
背景情况:
- 精确量化乙醇和甲醇对于葡萄酒行业的监管合规性和质量保证至关重要.
- 福里埃变换红外光谱法 (FTIR) 是一种快速,非破坏性的分析技术,采用最小的样品制备,使其适用于葡萄酒分析.
研究的目的:
- 调查使用FTIR与部分最小平方 (PLS) 回归相结合的可行性,以同时量化葡萄牙葡萄酒样本中的乙醇和甲醇.
- 开发和评估葡萄酒酒精含量的预测模型.
主要方法:
- 利用FTIR光谱仪从11种不同的葡萄牙单品种葡萄酒中获取各种年份的光谱数据.
- 采用PLS回归来构建用于同时确定乙醇和甲醇的定量模型.
- 验证了模型对两种分析物的预测能力.
主要成果:
- 开发的FTIR-PLS模型证明了葡萄酒样本中乙醇定量化的良好预测准确性.
- 该模型在精确量化甲醇方面表现较差,表明需要改进.
- 该研究证实了FTIR-PLS在常规葡萄酒质量控制中的潜力.
结论:
- 与PLS回归相结合的FTIR光谱是一种可行的方法,可以同时量化葡萄酒中的乙醇和甲醇.
- 目前的模型对质量控制有希望,但需要通过包括更多样本和度范围来增强,特别是对甲醇.
- 未来的研究应该专注于扩大数据集,以提高模型的稳定性和甲醇检测的准确性.
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