Chapter 6
Principles of Mass Spectrometry
质谱分析:概述
Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass ...
质谱法:同位素效应
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of ...
质谱分析:分子碎裂概述
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an ...
质谱仪
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record ...
质谱
A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ...
质谱:解释
Given a known molecular ion mass, the unknown compound can be identified.
The empirical formula is determined from the molecular ion mass and the isotope ...
质量分析仪:概述
Common mass analyzers include magnetic sector, double-focusing, quadrupole, time-of-flight, and ion trap analyzers.
The capability of any mass analyzer ...
质量分析仪:常见类型
The quadrupole mass analyzer consists of four parallel rods, across which are applied a DC voltage and a radio-frequency AC voltage.
Here, the field ...
高分辨率质谱 （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 ...
质谱分析:复杂分析
The analysis of complex mixtures requires the combination of separation methods and mass spectrometry in sequence, termed hyphenated methods.
GC–MS ...
串联质谱
Tandem mass spectrometry, or MS/MS, combines two mass analyzers in sequence, connected by a collision or interaction cell.
First, the samples are ionized ...
气相色谱-质谱法 （GC-MS）
Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a ...
电感耦合等离子体质谱法 （ICP–MS）:概述
Inductively coupled plasma–mass spectrometry, or ICP–MS, uses an ICP source to prepare samples for atomic mass spectrometry.
Solution-state ...
电感耦合等离子体质谱法 （ICP-MS）:干扰
Despite the advantages offered by ICP–MS, accurate elemental analysis is affected by spectroscopic and non-spectroscopic interferences.
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