Qualitative analysis of halogenated organic contaminants in American eel by gas chromatography/time-of-flight mass spectrometry

Chemosphere ◽  
2014 ◽  
Vol 116 ◽  
pp. 98-103 ◽  
Author(s):  
Jonathan D. Byer ◽  
Grazina Pacepavicius ◽  
Michel Lebeuf ◽  
R. Stephen Brown ◽  
Sean Backus ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Qualitative Analysis ◽  
Organic Contaminants ◽  
Time Of Flight ◽  
American Eel ◽  
Flight Mass Spectrometry

Quantitative and qualitative analysis of hemicellulose, cellulose and lignin bio-oils by comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry

2014 ◽  
Vol 1369 ◽  
pp. 147-160 ◽  
Author(s):  
Chrysoula Michailof ◽  
Themistoklis Sfetsas ◽  
Stylianos Stefanidis ◽  
Konstantinos Kalogiannis ◽  
Georgios Theodoridis ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Qualitative Analysis ◽  
Time Of Flight ◽  
Two Dimensional ◽  
Flight Mass Spectrometry

Qualitative analysis of Schizonepeta annua (Pall.) Schischk essential oil by gas chromatography–quadrupole time-of-flight mass spectrometry

2018 ◽  
Vol 24 (6) ◽  
pp. 454-462 ◽  
Author(s):  
Xi Bai ◽  
Jumai Maitusong ◽  
Bakri Mahinur ◽  
Haji A Aisa ◽  
Maitinuer Maiwulanjiang
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oil ◽  
Qualitative Analysis ◽  
Time Of Flight ◽  
Flight Mass Spectrometry ◽  
Nist Database ◽  
Chemical Content ◽  
Phenolic Esters ◽  
Relative Errors

In this study, a method for the qualitative analysis of small molecular compounds in Schizonepeta annua (Pall.) Schischk essential oil was established based on gas chromatography–quadrupole time-of-flight mass spectrometry. In addition to an automated search of the NIST library, the identification of oxygenated monoterpenes, phenolic esters, and phenolic compounds was achieved by two additional strategies. One strategy involved comparing the relative errors of accurate masses measured for ions in the experimental spectra with those calculated for fragments identified from the NIST database of candidate matches. The second strategy involved combination of the product ion scans and positive chemical ionisation spectra for structural elucidation. Overall, 95.45% of the total essential oil volatile chemical content of Schizonepeta annua (Pall.) Schischk was identified, with phenolic monoterpenes dominating.

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