Mass spectrometric method of field evaporation of ions from solutions as a potential possibility of the experimental determination of changes in the enthalpy of solvation of ions and ion clusters in electrolyte solutions

2007 ◽  
Vol 416 (2) ◽  
pp. 275-279 ◽  
Author(s):  
N. B. Zolotoy ◽  
G. V. Karpov
Keyword(s):  
Electrolyte Solutions ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Field Evaporation ◽  
Enthalpy Of Solvation ◽  
Ion Clusters ◽  
Solvation Of Ions ◽  
Potential Possibility

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>

Determination of JWH-210, JWH-122 and JWH-081 in urine by Liquid Chromatography Mass Spectrometric method

2017 ◽  
Vol 280 ◽  
pp. S292
Author(s):  
Gordana Brajković ◽  
Jasmina Jović-Stošić ◽  
Snežana Đorđević ◽  
Vesna Kilibarda ◽  
Marijana Čurćić ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method

Determination of serum methylarginine levels by tandem mass spectrometric method in patients with ankylosing spondylitis

Amino Acids ◽  
2021 ◽  
Author(s):  
Duygu Eryavuz Onmaz ◽  
Kevser Isik ◽  
Abdullah Sivrikaya ◽  
Sedat Abusoglu ◽  
İlknur Albayrak Gezer ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Tandem Mass ◽  
Mass Spectrometric Method ◽  
Tandem Mass Spectrometric
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