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Equilibrium conditions in the MALDI ...

Yao, Daqing.

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Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions./
Author:	Yao, Daqing.
Description:	65 p.
Notes:	Source: Masters Abstracts International, Volume: 42-01, page: 0234.
Contained By:	Masters Abstracts International42-01.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1414787

Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions.
Yao, Daqing.

Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions. - 65 p.

Source: Masters Abstracts International, Volume: 42-01, page: 0234.

Thesis (M.S.)--The University of Texas at Arlington, 2003.

Matrix-Assisted Laser Desorption Ionization Mass Spectrometry (MALDI-MS) has rapidly developed as a powerful tool for the mass analysis of large molecules. However, a comprehensive picture of the MALDI ion formation process remains elusive despite a variety of models having been proposed in recent years.Subjects--Topical Terms:

586156
Chemistry, Analytical.

Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions.
LDR:02201nmm 2200265 4500 001 1858234
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035 $a (UnM)AAI1414787
035 $a AAI1414787
040 $a UnM $c UnM
100 1 $a Yao, Daqing. $3 1945930
245 1 0 $a Equilibrium conditions in the MALDI plume: Thermodynamic evaluation of in-plume proton transfer reactions.
300 $a 65 p.
500 $a Source: Masters Abstracts International, Volume: 42-01, page: 0234.
500 $a Supervisor: Gary R. Kinsel.
502 $a Thesis (M.S.)--The University of Texas at Arlington, 2003.
520 $a Matrix-Assisted Laser Desorption Ionization Mass Spectrometry (MALDI-MS) has rapidly developed as a powerful tool for the mass analysis of large molecules. However, a comprehensive picture of the MALDI ion formation process remains elusive despite a variety of models having been proposed in recent years.
520 $a This project has investigated the equilibrium nature of the MALDI plume by studying the proton transfer reactions between MALDI matrices and amino acid/dipeptide analytes. The mass spectra obtained were evaluated with regard to the thermochemical properties of the matrix proton donor and the amino acid or dipeptide proton acceptor constituent species. The studies performed show that a plot of the natural logarithm of the proton acceptor to proton donor ion signal ratio versus the basicity of the proton acceptor is linear. This result demonstrates that there is a systematic trend in the proton acceptor to proton donor ratio as a function of the thermodynamic properties of the donor and acceptor. This trend supports the existence of a thermodynamic equilibrium in the laser desorption plume. Additional analysis of the experimental trends the experimental trends allows the determination of the gas-phase basicities of the matrix proton donor species and the effective temperature of the proton transfer reaction.
590 $a School code: 2502.
650 4 $a Chemistry, Analytical. $3 586156
690 $a 0486
710 2 0 $a The University of Texas at Arlington. $3 1025869
773 0 $t Masters Abstracts International $g 42-01.
790 1 0 $a Kinsel, Gary R., $e advisor
790 $a 2502
791 $a M.S.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1414787