相关实验视频

Updated: Jun 11, 2025

Author Spotlight: Discovering New Alkaloids in Plants with Advanced Mass Spectrometry Techniques

Author Spotlight: Discovering New Alkaloids in Plants with Advanced Mass Spectrometry Techniques

Published on: March 8, 2024

食品真实性的非向核磁共振分析:对番茄样本的比较研究

Biagia Musio¹, Rosa Ragone¹, Stefano Todisco¹

¹Department of Civil, Environmental, Land, Building Engineering and Chemistry (DICATECh), Polytechnic University of Bari, Via Orabona, 4, I-70125 Bari, Italy.

Molecules (Basel, Switzerland)

|September 28, 2024

概括

非定位核磁共振 (NMR) 光谱显示了食品分析的高可重复性,即使使用不同的操作人员和设备. 这证实了其在常规食品控制中用于诸如确定番茄原产地等任务的有效性.

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:

非定位核磁共振 (NMR) 是一种强大的分析工具,用于食品控制.
对于非向的NMR方法,需要标准化的程序.
之前的研究表明,当一个操作员在不同的仪器上准备样本时,光谱等价性.

研究的目的:

评估NMR光谱的可重现性,当不同的运营商独立准备样本并进行测量时.
在实验室间条件下评估NMR对食品控制的适用性.
建立和验证一个分类模型,用NMR数据来评估西红的地理来源.

主要方法:

两个独立的实验室使用优化程序准备了63个西红样本.
使用个人实验室光谱仪记录了1D质子 (¹H) NMR光谱.
使用来自两家实验室的光谱指纹数据开发了一个分类模型.

主要成果:

该研究评估了不同运营商在独立实验室中获得的NMR光谱的可重复性.
一个分类模型实现了97.62%的正确样本分类率来确定西红的地理来源.
在各种操作条件下,光谱数据显示了令人满意的性能.

结论:

核磁共振技术适用于常规食品控制,在不同运营商和独立实验室中证明可重复性.
经过验证的分类模型支持使用NMR进行地理来源评估.
这项工作证实了非向性NMR对于可靠的食品分析的稳定性.

关键词:

这是NMR的NMR.指纹指纹指纹指纹指纹指纹食品控制食品控制地理来源的地理来源.实验室间的比较.代谢组分析分析方法验证方法的验证方法.可以追溯的可追溯性.

更多相关视频

PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis

PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis

Published on: May 11, 2017

Isolation and Biophysical Study of Fruit Cuticles

Isolation and Biophysical Study of Fruit Cuticles

Published on: March 30, 2012

相关概念视频

Applications Of NMR In Biology

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.

Nuclear Magnetic Resonance (NMR): Overview

Nuclear Magnetic Resonance (NMR): Overview

Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...