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Updated: May 15, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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Published on: April 18, 2019

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通过染色学对环境样本进行非目标选的优先级策略 - 高分辨率质谱学:一个教程

Jonathan Zweigle1, Selina Tisler1, Marta Bevilacqua1

  • 1Analytical Chemistry Group, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark.

Journal of chromatography. A
|April 9, 2025
PubMed
概括

使用高分辨率质谱法 (HRMS) 的非目标查 (NTS) 有助于发现新兴关注的化学物质 (CEC). 本教程概述了七个策略来优先考虑这些CEC,重点确定高风险化合物的努力,以更好地评估环境.

关键词:
数据预处理数据的预处理.新出现的污染物 新出现的污染物环境监测环境监测环境监测在NTS工作流程中.确定优先级的方法

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Mass Spectrometry: Complex Analysis

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...
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The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
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High-Resolution Mass Spectrometry (HRMS)

The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
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