Mass spectrometric and PM5 study of some piperidine-N-methyldiphosphonic acids and their complexes with alkali cations

2006 ◽  
Vol 782 (2-3) ◽  
pp. 183-190 ◽  
Author(s):  
Nataliya Lyapchenko ◽  
Grzegorz Schroeder ◽  
Piotr Przybylski ◽  
Agnieszka Burzyńska ◽  
Paweł Kafarski ◽  
...  
Keyword(s):  
Mass Spectrometric ◽  
Alkali Cations

Mass spectrometric and PM5 study of N-(2-pyridyl)-aminomethyldiphoshonic acids and their complexes with alkali cations

2005 ◽  
Vol 750 (1-3) ◽  
pp. 142-151 ◽  
Author(s):  
Grzegorz Schroeder ◽  
Nataliya Lyapchenko ◽  
Piotr Przybylski ◽  
Bogumil Brzezinski ◽  
Tomasz Kozik ◽  
...  
Keyword(s):  
Mass Spectrometric ◽  
Alkali Cations

scholarly journals Electrospray-mass spectrometric studies of selectivity of alkali metal cations extraction by calix[4]arene crowns

2000 ◽  
Vol 14 (3) ◽  
pp. 127-139 ◽  
Author(s):  
F. Allain ◽  
H. Virelizier ◽  
C. Moulin ◽  
C. K. Jankowski ◽  
J. F. Dozol ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Alkali Metal ◽  
Electrospray Ionization ◽  
Mass Spectrometric ◽  
Ionization Mass ◽  
Alkali Metal Cations ◽  
Alkali Cations ◽  
Esi Ms ◽  
Considerable Controversy ◽  
Cesium Complex

Electrospray Ionization Mass Spectrometry (ESI/MS) has quickly become a versatile method of qualitative analysis of a wide variety of host–guest complexes formed in solution. However, considerable controversy exists on how ESI spectra quantitatively reflect and compare to the results obtained on these complexes. The extraction of alkali cations from acidic aqueous solutions by nine various calix[4]arenes-crown-6 diluted in NPOE, was studied by using ESI/MS. The stoichiometry of cesium complex and Cs+/Na+selectivity were evaluated.

A Questionnaire Survey on General Status and Opinions about Clinical Mass Spectrometric Analysis in Korea (2018)

2019 ◽  
Vol 9 (3) ◽  
pp. 161
Author(s):  
Sung-Eun Cho ◽  
Hyojin Chae ◽  
Hyung-Doo Park ◽  
Sail Chun ◽  
Yong-Wha Lee ◽  
...  
Keyword(s):  
Questionnaire Survey ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Spectrometric Analysis ◽  
General Status

Mechanisms of Dopant Depth Profile Modification During Mass Spectrometric Analysis of Multilayer Structure

2015 ◽  
Vol 60 (6) ◽  
pp. 511-520 ◽  
Author(s):  
A.A. Efremov ◽  
◽  
V.G. Litovchenko ◽  
V.P. Melnik ◽  
O.S. Oberemok ◽  
...  
Keyword(s):  
Depth Profile ◽  
Multilayer Structure ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Spectrometric Analysis ◽  
Profile Modification

Mass Spectrometric Analysis of Porcine Rhodopsin¶

2002 ◽  
Vol 75 (3) ◽  
pp. 316 ◽  
Author(s):  
Zsolt Ablonczy ◽  
Patrice Goletz ◽  
Daniel R. Knapp ◽  
Rosalie K. Crouch
Keyword(s):  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Spectrometric Analysis

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

2017 ◽  
Author(s):  
Xueming Dong
Keyword(s):  
Aromatic Compounds ◽  
Supported Catalyst ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Aromatic Rings ◽  
Tandem Mass Spectrometric ◽  
Catalytic Deoxygenation ◽  
Oxygen Atoms

Catalytic deoxygenation of coal enhances the stability and combustion performance of coal-derived liquids. However, determination of the selectivity of removal of oxygen atoms incorporated in or residing outside of aromatic rings is challenging. This limits the ability to evaluate the success of catalytic deoxygenation processes. A mass spectrometric method, in-source collision-activated dissociation (ISCAD), combined with high resolution product ion detection, is demonstrated to allow the determination of whether the oxygen atoms in aromatic compounds reside outside of aromatic rings or are part of the aromatic system, because alkyl chains can be removed from aromatic cores via ISCAD. Application of this method for the analysis of a subbituminous coal treated using a supported catalyst revealed that the catalytic treatment reduced the number of oxygen-containing heteroaromatic rings but not the number of oxygen atoms residing outside the aromatic rings.<br>

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

2017 ◽  
Author(s):  
Xueming Dong
Keyword(s):  
Aromatic Compounds ◽  
Supported Catalyst ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Aromatic Rings ◽  
Tandem Mass Spectrometric ◽  
Catalytic Deoxygenation ◽  
Oxygen Atoms

Catalytic deoxygenation of coal enhances the stability and combustion performance of coal-derived liquids. However, determination of the selectivity of removal of oxygen atoms incorporated in or residing outside of aromatic rings is challenging. This limits the ability to evaluate the success of catalytic deoxygenation processes. A mass spectrometric method, in-source collision-activated dissociation (ISCAD), combined with high resolution product ion detection, is demonstrated to allow the determination of whether the oxygen atoms in aromatic compounds reside outside of aromatic rings or are part of the aromatic system, because alkyl chains can be removed from aromatic cores via ISCAD. Application of this method for the analysis of a subbituminous coal treated using a supported catalyst revealed that the catalytic treatment reduced the number of oxygen-containing heteroaromatic rings but not the number of oxygen atoms residing outside the aromatic rings.<br>

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