The Application of “Double Isolation” in Fourier Transform Ion Cyclotron Resonance Sustained off-Resonance Irradiation Collisionally-Induced Dissociation Tandem Mass Spectrometry to Remove Labile Isobaric Impurities

2011 ◽  
Vol 17 (5) ◽  
pp. 481-484
Author(s):  
Paul J. Gates ◽  
Norberto P. Lopes ◽  
Ernani Pinto ◽  
Pio Colepicolo ◽  
Karina H.M. Cardozo
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Tandem Mass Spectrometry ◽  
Cyclotron Resonance ◽  
Ion Cyclotron Resonance ◽  
Tandem Mass ◽  
Ion Cyclotron

Relative quantitation of phosphatidylcholines with interfered masses of protonated and sodiated molecules by tandem and Fourier-transform ion cyclotron resonance mass spectrometry

2019 ◽  
Vol 25 (2) ◽  
pp. 259-264 ◽  
Author(s):  
Vitaliy Chagovets ◽  
Aleksey Kononikhin ◽  
Alisa Tokoreva ◽  
Denis Bormotov ◽  
Nataliia Starodubtseva ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Tandem Mass Spectrometry ◽  
Cyclotron Resonance ◽  
Sodium Ion ◽  
Clinical Samples ◽  
Ion Cyclotron Resonance ◽  
Tandem Mass ◽  
Relative Quantitation ◽  
Ion Cyclotron

The present work deals with deconvolution of interfered peaks of protonated and sodiated phosphatidylcholines to solve the problem of relative quantitation of these compounds. The method was developed based on the fact that adducts of phosphatidylcholines with proton and sodium ion give unique characteristic peaks in tandem mass spectrometry. Ultra-high-resolution Fourier-transform ion cyclotron resonance mass spectrometry was used to resolve interfered peaks and thus validate the results of tandem mass spectrometry-based deconvolution. Applicability of the method was tested with synthesized phosphatidylcholines and applied for tissue-spray analysis of the clinical samples and demonstrated good correlation (0.996) between MS/MS and Fourier-transform ion cyclotron resonance mass spectrometry results.

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