Chapter 6
Principles of Mass Spectrometry
ספקטרומטריית מסות: סקירה כללית
Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass ...
ספקטרומטריית מסות: אפקט איזוטופ
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 ...
ספקטרומטריית מסות: סקירה כללית של פיצול מולקולרי
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 ...
ספקטרומטרים של מסות
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record ...
ספקטרום מסות
A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ...
ספקטרום המסות: פרשנות
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 ...
מנתחי מסה: סקירה כללית
Common mass analyzers include magnetic sector, double-focusing, quadrupole, time-of-flight, and ion trap analyzers.
The capability of any mass analyzer ...
מנתחי מסה: סוגים נפוצים
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 ...
ספקטרומטריית מסות ברזולוציה גבוהה (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 ...
ספקטרומטריית מסות: אנליזה מורכבת
The analysis of complex mixtures requires the combination of separation methods and mass spectrometry in sequence, termed hyphenated methods.
GC–MS ...
ספקטרומטריית מסות טנדם
Tandem mass spectrometry, or MS/MS, combines two mass analyzers in sequence, connected by a collision or interaction cell.
First, the samples are ionized ...
כרומטוגרפיית גז – ספקטרומטריית מסות (GC–MS)
Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a ...
ספקטרומטריית פלזמה-מסה מצומדת אינדוקטיבית (ICP-MS): סקירה כללית
Inductively coupled plasma–mass spectrometry, or ICP–MS, uses an ICP source to prepare samples for atomic mass spectrometry.
Solution-state ...
ספקטרומטריית פלזמה-מסה מצומדת אינדוקטיבית (ICP-MS): הפרעות
Despite the advantages offered by ICP–MS, accurate elemental analysis is affected by spectroscopic and non-spectroscopic interferences.
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