使用激光共聚焦显微镜-拉曼光谱法评估粉颗粒氧化:一种新的分析方法
Xindong Xu1, Kaiyang Shi2, Ji Ma3
1College of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan 528225, China; China-Singapore International Joint Research Institute, Guangzhou 510700, China.
Carbohydrate polymers
|August 16, 2025
概括
一种新的激光共聚焦显微镜-拉曼光谱 (LCM-Raman) 方法快速分析氧化粉.
科学领域:
- 食品科学 食品科学 食品科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 确定氧化粉的总氧化度 (TDO) 的传统方法耗时且复杂.
- 现有的方法难以区分颗粒内部和颗粒内部的氧化,这阻碍了详细的研究.
- 准确评估粉氧化对于食品应用至关重要.
研究的目的:
- 开发一种快速,非破坏性的方法来分析粉氧化水平.
- 为了可视化和量化粉颗粒中的和粉颗粒之间的氧化.
- 为研究氧化粉的结构变化提供一种工具.
主要方法:
- 使用了激光共聚焦显微镜-拉曼光谱 (LCM-Raman).
- 从粉拉曼光谱中提取了478和1401厘米-1的强度值.
- 用地图扫描和线扫描用于可视化和同质性评估.
主要成果:
- 确定了氧化水平的相关系数 (R1401/478).
- 在LCM-拉曼和定位TDO之间实现了高相关性 (R2 = 0.99327).
- 与商业氧化粉的定位相比,显示出 3% 的误差.
结论:
- LCM-Raman提供了一种快速,准确和非破坏性的方法来评估粉氧化.
- 该技术允许在颗粒尺度上可视化氧化分布.
- 这种方法为深入研究氧化粉结构提供了一个实用的工具.
相关概念视频
01:20Raman Spectroscopy: Overview
600
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
600
01:26Raman Spectroscopy Instrumentation: Overview
532
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
532