使用稳定的同位素,元素指纹以及数据驱动但可解释的方法来识别法国葡萄酒的年份
Hanxin Yu1, Yinghao Chu1, Xuehai Bian2
1Department of Systems Engineering, City University of Hong Kong, Hong Kong Special Administrative Region of China.
Food chemistry
|November 11, 2024
概括
稳定的同位素和元素指纹可以根据气候来确定法国葡萄酒的年份. 这种方法可以准确地识别葡萄酒的来源和质量,在波尔多,模型的准确性高达95%.
科学领域:
- 地质化学 地质化学
- 葡萄酒学 葡萄酒学 葡萄酒学
- 气候科学 气候科学
背景情况:
- 确定葡萄酒的年份和来源对于真实性和质量评估至关重要.
- 气候对葡萄的成分和葡萄酒的特征有很大的影响.
- 稳定同位素和元素分析为葡萄酒认证提供了潜在的指标.
研究的目的:
- 评估稳定同位素和元素指纹在法国葡萄酒年份评估中的使用.
- 为了将同位素和元素特征与气候因素 (降水和温度) 相关联.
- 开发和验证数据驱动的模型,以准确识别葡萄酒年份.
主要方法:
- 在葡萄酒成分 (乙醇,甘氨酸,水) 中分析稳定同位素 (δ13C, δ18O).
- 在波尔多,勃第和朗格多克-卢西隆的葡萄酒中确定16个元素指纹.
- 应用数据驱动模型和可解释的方法来识别年份和选择变量.
主要成果:
- 同位素和元素特征受到葡萄季气候的显著影响,特别是葡萄成熟期间的降水和温度.
- 最佳条件 (降水量减少,温度提高) 对葡萄的成分产生积极影响,导致葡萄酒质量优越.
- 数据驱动型号在葡萄鉴定中实现了高精度,总体达到72.0%,波尔多地区达到95.0%.
结论:
- 稳定同位素和元素指纹,结合数据驱动模型,为法国葡萄酒年鉴评估提供了强大的方法.
- 气候因素是同位素和元素特征的关键驱动因素,直接影响葡萄酒质量和年份特征.
- 可解释的方法有效地识别了关键变量,使得精确的复古预测能够在减少的数据集下进行.
更多相关视频
相关概念视频
Experimental Determination of Chemical Formula
37.7K
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
37.7K
Titrimetric Methods: Types and Commonly Used Strategies
878
In chemistry, titrimetric methods are broadly classified into three types: volumetric, gravimetric, and coulometric. Volumetric titrations involve measuring the volume of a titrant of known concentration that is required to react completely with an analyte. In gravimetric titrations, the standard solution reacts with the analyte to form an insoluble precipitate, which is filtered, dried, and weighed. In coulometric titrations, current is applied to an electrochemical reaction until the reaction...
878
Chromatographic Methods: Classification
1.8K
Chromatographic techniques are classified in three ways: the classification is based on the physical state of the stationary and mobile phases, how the mobile phase and the stationary phase contact each other, or through the chemical or physical processes that isolate the components of the sample. Typically, the mobile phase is either a liquid or gas, while the stationary phase is either a solid or a liquid layer applied to a solid surface.
Chromatographic techniques are typically named by...
Chromatographic techniques are typically named by...
1.8K
Mass Spectrometry: Alcohol Fragmentation
3.3K
Alcohols (R-OH) ionize to lose one non-bonded electron from the oxygen atom, forming molecular ions. Due to their tendency to fragment rapidly, the intensity of the molecular ion peak in the mass spectrum is weak or sometimes absent. The fragmentation patterns for alcohols occur in two ways, i.e. ⍺-cleavage and dehydration. During ⍺-cleavage, the bond at the ⍺-position adjacent to the hydroxyl group cleaves to give a resonance-stabilized cation and a radical. However,...
3.3K
UV–Vis Spectroscopy: Woodward–Fieser Rules
23.8K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...
23.8K
Classification of Titrimetric Analysis Based on Reaction Types
723
Titrimetric analysis in solution chemistry involves measuring the volume of solutions and is often called volumetric analysis. The standard solution of known concentration in the burette is called the titrant, whereas the solution of unknown concentration in the flask is called the analyte, or titrand. Titrimetric analyses can be classified into four types based on the reactions between the titrant and analyte.
Titrations between an acid and a base lead to neutralization reactions that form...
Titrations between an acid and a base lead to neutralization reactions that form...
723


