Comparison of Gas Chromatography-Coupled Time-of-Flight Mass Spectrometry and1H Nuclear Magnetic Resonance Spectroscopy Metabolite Identification in White Wines from a Sensory Study Investigating Wine Body

2009 ◽  
Vol 57 (15) ◽  
pp. 6899-6907 ◽  
Author(s):  
Kirsten Skogerson ◽  
Ron Runnebaum ◽  
Gert Wohlgemuth ◽  
Jeffrey de Ropp ◽  
Hildegarde Heymann ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Gas Chromatography ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Metabolite Identification ◽  
Resonance Spectroscopy ◽  
White Wines ◽  
Flight Mass Spectrometry ◽  
Sensory Study

scholarly journals Study of Pesticide Synthesis Residual Products in Commercial Chlorpyrifos Formulations

1997 ◽  
Vol 80 (4) ◽  
pp. 717-724 ◽  
Author(s):  
Elena Romero Melgosa ◽  
Cecilia áSaenz Barrio ◽  
Jesús Sanz Asensio ◽  
Javier Galbán Bernal
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Magnetic Resonance ◽  
Qualitative Study ◽  
Magnetic Resonance Spectroscopy ◽  
Capillary Gas Chromatography ◽  
Diethyl Ester ◽  
Resonance Spectroscopy

Abstract A method to separate and identify manufacturing residual products (MRPs) in commercial formulations of chlorpyrifos is presented. The method is based on 3 stages: (1) qualitative study by capillary gas chromatography, (2) separation by liquid chromatography, and (3) identification by mass spectrometry and nuclear magnetic resonance spectroscopy. Using this methodology, the authors identified different MRPs in commercial chlorpyrifos: a phosphorochloridothioic acid O,O-diethyl ester chloride, TCP (3,5,6-trichloropyridin-2-ol), and sulfotep (tetraethyl dithionopyrophosphate). In addition, a compound that has not been described until now, was identified. Given the name “Romerales,” the compound has toxicity similar to or greater than that of chlorpyrifos.

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