DEVELOPMENT OF AN ISOTOPE-DILUTION GAS CHROMATOGRAPHIC-MASS SPECTROMETRIC METHOD FOR THE ANALYSIS OF POLYCYCLIC AROMATIC COMPOUNDS IN ENVIRONMENTAL MATRICES

2004 ◽  
Vol 24 (4-5) ◽  
pp. 309-323 ◽  
Author(s):  
Adrienne R. Boden ◽  
Eric J. Reiner
Keyword(s):  
Isotope Dilution ◽  
Aromatic Compounds ◽  
Mass Spectrometric ◽  
Polycyclic Aromatic Compounds ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Environmental Matrices ◽  
Polycyclic Aromatic ◽  
Chromatographic Mass

Isotope Dilution Gas Chromatographic–Mass Spectrometric Method for the Determination of Isoflavonoids, Coumestrol, and Lignans in Food Samples

1996 ◽  
Vol 233 (2) ◽  
pp. 169-180 ◽  
Author(s):  
Witold Mazur ◽  
Theodore Fotsis ◽  
Kristina Wähälä ◽  
Sirpa Ojala ◽  
Auli Salakka ◽  
...  
Keyword(s):  
Isotope Dilution ◽  
Food Samples ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Chromatographic Mass

Isotope dilution gas chromatographic-mass spectrometric method for the determination of lignans and isoflavonoids in human urine, including identification of genistein

1991 ◽  
Vol 199 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Herman Adlercreutz ◽  
Theodore Fotsis ◽  
Christoph Bannwart ◽  
Kristiina Wähälä ◽  
Gösta Brunow ◽  
...  
Keyword(s):  
Isotope Dilution ◽  
Human Urine ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Chromatographic Mass

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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