[基于气相色谱-质谱学的广泛向的代谢学方法的开发]
Ya-Ting Wang1, Yang Yang1, Xiu-Lan Sun1
1State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Food, School of Food Science and Technology, Collaborative Innovation Center, Jiangnan University, Wuxi 214122, China.
Se pu = Chinese journal of chromatography
|June 1, 2023
概括
这项研究引入了一种针对性广泛的气色谱质谱法 (GC-MS) 方法,用于代谢学,增强代谢物检测和信号质量. 新方法提高了分析生物系统的准确性和覆盖范围.
科学领域:
- 分析化学 分析化学
- 代谢学 代谢学 代谢学
- 系统生物学 系统生物学
背景情况:
- 气色谱-质谱 (GC-MS) 对于代谢学至关重要,但面临着像低扫描速率和狭窄的检测范围这样的局限性.
- 传统的GC-MS方法难以进行全面的代谢物分析,因此需要改进分析策略.
- 对广泛的代谢物进行准确和灵敏的检测对于理解生物系统至关重要.
研究的目的:
- 开发基于GC-MS的广泛向的代谢学方法,以提高覆盖范围和准确性.
- 在代谢分析中克服传统GC-MS的局限性.
- 为了使许多代谢物的定性和半定量检测,而无需自建数据库.
主要方法:
- 在FiehnLib数据库中使用直链脂肪酸甲基 (FAMEs) 建立了保留时间和保留指数 (RI) 之间的线性关系.
- 基于RI计算的代谢物保留时间,以减轻色谱条件的变化.
- 优化扫描间隔为0.20秒,保留时间值为0.15分钟;为611种代谢物构建了选择性离子监测 (SIM) 方法表.
主要成果:
- 与全扫描非目标GC-MS相比,广泛准的GC-MS方法显示检测到的代谢物增加了20%-30%,信号噪声比增加了15%-20%.
- 观察到高可重复性,其中84%的日内和54%的日间相对标准偏差 (RSD) 的代谢物保留时间低于2%.
- 该方法涵盖了39个代谢途径,包括糖解和三碳酸循环,适用于热稳定,挥发性代谢物<600Da.
结论:
- 提出的广泛向的GC-MS方法显著提高了代谢物检测量和信号噪声比.
- 这种方法通过提供更好的灵敏度,可重复性和广泛覆盖,扩大了GC-MS在代谢学中的应用范围.
- 该方法适用于分析生物样本中的各种代谢物,推进系统生理学研究.
相关概念视频
01:14Gas Chromatography–Mass Spectrometry (GC–MS)
4.4K
Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall....
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall....
4.4K
01:21Mass Spectrometry: Complex Analysis
832
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
832
01:13Gas Chromatography: Overview of Detectors
648
Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
648
01:13Gas Chromatography: Introduction
2.1K
Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
2.1K