开发一种动态的多参数预测模型,用于"乌尼布朗克"葡萄的成熟过程,使用可见光和近红外光谱学
Chenxue Su1, Jia Che1, Zehao Wu1
1College of Enology, Northwest A&F University, Yangling 712100, China.
Foods (Basel, Switzerland)
|February 13, 2026
概括
可见/近红外 (Vis/NIR) 光谱学准确地预测了乌格尼布朗克葡萄的质量. 该方法量化了pH,糖和含量等关键参数,为传统实验室分析提供了快速的替代方案.
科学领域:
- 农业科学 农业科学
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 准确评估葡萄的物理化学性质对于酒至关重要.
- 确定葡萄品质的传统方法往往是破坏性的和耗时的.
- 非破坏性技术为快速质量评估提供了一个有希望的替代方案.
研究的目的:
- 开发和验证用于确定乌格尼白色葡萄的关键质量参数的非破坏性方法.
- 调查可见/近红外 (Vis/NIR) 光谱学与化学测量结合的疗效.
- 为了比较全频谱和特征波长模型来预测葡萄的组成.
主要方法:
- 使用手持式Vis/NIR光谱仪获得分散反射频谱 (400-1507nm).
- 使用SPXY算法进行了数据集分区.
- 使用部分最小平方 (PLS),支持向量机回归 (SVR) 和卷积神经网络 (CNN) 算法构建了定量模型.
主要成果:
- 基于特征的模型在预测总酸度 (TA),降解糖 (RS) 和皮肤总含量 (TPCN) 中表现出色.
- 全频谱模型在pH,总溶性固体 (TSS) 和种子总含量 (TPCD) 方面表现出卓越的性能.
- 最佳模型实现了高预测准确性,Rp2值高达0.957,RPD值高达4.798.
结论:
- 视/红外光谱仪提供了一种可靠的,非破坏性的工具,用于评估乌格尼布朗克葡萄的质量.
- 开发的化学测量模型能够准确预测基本的物理化学参数.
- 这项技术可以大大简化葡萄酒行业的葡萄质量控制.
相关概念视频
Light Acquisition
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for electronic transitions. As a result...
UV–Vis Spectroscopy of Conjugated Systems
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
One of the factors influencing λmax is the extent of conjugation in the...
UV–Vis Spectrometers
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
UV–Vis Spectroscopy: Woodward–Fieser Rules
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 structure by adding the contributions...
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...


