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Volatilization01:10

Volatilization

362
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
362
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

177
Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
177
Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

191
Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
191
Voltammograms: Overview01:16

Voltammograms: Overview

168
Voltammograms are current plots as a function of applied potential, offering insights into electrochemical systems. The shape of a voltammogram depends on how the current is measured and whether convection (heat transfer by fluid movement) is present or absent.
Shapes of Voltammograms
168
Voltammetry: Overview01:20

Voltammetry: Overview

1.2K
Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
1.2K

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Updated: Jun 5, 2025

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS
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一个全面的指南 volatolomics 数据分析的数据分析.

M Skawinski1, F J van Schooten1, A Smolinska1

  • 1Department of Pharmacology and Toxicology, Institute of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands.

Journal of breath research
|December 6, 2024
PubMed
概括

挥发性有机化合物的研究,提供非侵入性疾病诊断. 本指南详细介绍了使用复杂的生物数据进行准确的代谢物识别和可靠的疾病监测的数据分析方法.

关键词:
数据预处理数据预处理.机器学习是机器学习.质谱测量质谱测量质谱测量质量测量质谱测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量多变量数据分析多变量数据分析挥发性有机化合物 (VOC) 是一种挥发性有机化合物.这就是volatolomics.

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科学领域:

  • 代谢学 代谢学 代谢学
  • 分析化学 分析化学
  • 生物信息学是一种生物信息学.

背景情况:

  • 挥发性有机化合物 (VOC) 的研究,是代谢学中的一个不断发展的领域.
  • 它对非侵入性诊断和疾病监测具有重大前景.
  • 从质谱仪和气体传感器阵列等仪器分析高分辨率数据存在挑战.

研究的目的:

  • 为volatolomics数据分析提供一个全面的指南.
  • 突出提高数据质量和分析结果的重要步骤.
  • 为研究人员提供知识,以导航复杂的飞行学数据集.

主要方法:

  • 探索数据清理和预处理策略.
  • 应用统计和机器学习技术 (缩小维度,聚类,分类,变量选择).
  • 讨论数据处理实践:缺失数据归算,异常值检测,模型验证和数据集成.

主要成果:

  • 强调方法选择和数据处理在识别有意义的代谢物的关键作用.
  • 展示了强大的分析如何导致准确的诊断结论.
  • 强调了解方法的优点和局限性对于可靠的研究结果的重要性.

结论:

  • 在volatolomics数据分析中的知情决策增强了发现可靠性.
  • 这本指南通过改善对健康和疾病中的代谢过程的理解来推动该领域的进步.
  • 有效的volatolomics数据分析是释放其诊断潜力的关键.