Determination of Alkyltrimethylammonium Chlorides in River Water by Gas Chromatography/Ion Trap Mass Spectrometry with Electron Impact and Chemical Ionization

2003 ◽  
Vol 75 (8) ◽  
pp. 1792-1797 ◽  
Author(s):  
Wang-Hsien Ding ◽  
Pei-Chuan Tsai
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
River Water ◽  
Electron Impact ◽  
Chemical Ionization ◽  
Ion Trap ◽  
Ion Trap Mass Spectrometry

scholarly journals Determination of Glyphosate and Its Metabolite, (Aminomethyl)phosphonic Acid, in River Water

1996 ◽  
Vol 79 (1) ◽  
pp. 157-162 ◽  
Author(s):  
Paul S Mogadati ◽  
Judith B Louis ◽  
Joseph D Rosen
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
River Water ◽  
Phosphonic Acid ◽  
Exchange Resin ◽  
Ion Trap ◽  
Anion Exchange Resin ◽  
Ion Trap Mass Spectrometry ◽  
Aminomethyl Phosphonic Acid

Abstract A procedure for extracting glyphosate and its meta bolite, (aminomethyl)phosphonic acid, from river water and for determining these 2 compounds by gas chromatography/ion trap mass spectrometry is described. Both compounds were extracted with Bio-Rad AG 1-X8 anion-exchange resin (formate form) prior to derivatization with a mixture of trifluoroacetic anhydride and trifluoroethanol. Limits of detection for glyphosate and its metabolite were 1 ppb even when as little as 10 mL water was analyzed. Recoveries of both compounds from river water fortified at 50 ppb were >90%.

Determination of dimethyl fumarate (DMFu) in silica gel pouches using gas chromatography coupled ion trap mass spectrometry

2011 ◽  
Vol 46 (4) ◽  
pp. 341-349 ◽  
Author(s):  
Patrizia Stefanelli ◽  
Danilo Attard Barbini ◽  
Silvana Girolimetti ◽  
Angela Santilio ◽  
Roberto Dommarco
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Silica Gel ◽  
Ion Trap ◽  
Dimethyl Fumarate ◽  
Ion Trap Mass Spectrometry

Nitric Oxide Chemical Ionization Ion Trap Mass Spectrometry for the Determination of Automotive Exhaust Constituents

1997 ◽  
Vol 69 (24) ◽  
pp. 5121-5129 ◽  
Author(s):  
Mark A. Dearth ◽  
Keiji G. Asano ◽  
Kevin J. Hart ◽  
Michelle V. Buchanan ◽  
Douglas E. Goeringer ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Mass Spectrometry ◽  
Chemical Ionization ◽  
Ion Trap ◽  
Ion Trap Mass Spectrometry ◽  
Automotive Exhaust

scholarly journals Determination of Spiroxamine Residues in Grapes, Must, and Wine by Gas Chromatography/Ion Trap-Mass Spectrometry

2005 ◽  
Vol 88 (6) ◽  
pp. 1834-1839 ◽  
Author(s):  
Nicholas G Tsiropoulos ◽  
Konstantinos Liapis ◽  
Dimitrios T Likas ◽  
George E Miliadis
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Ion Trap ◽  
Extraction Procedure ◽  
Ion Trap Mass Spectrometry ◽  
Limit Of Quantification ◽  
Analytical Methodology ◽  
White Wines ◽  
Relative Standard

Abstract Analytical methodology was developed and validated for the determination of spiroxamine residues in grapes, must, and wine by gas chromatography/ion trap-mass spectrometry (GC/IT-MS). Two extraction procedures were used: the first involved grapes, must, and wine extraction with alkaline cyclohexane–dichloromethane (9 + 1, v/v) solution, and the second grape extraction with acetone, dichloromethane, and petroleum ether. In both procedures, the extract was centrifuged, evaporated to dryness, and reconstituted in cyclohexane or 2,2,4-trimethylpentane–toluene (9 + 1, v/v), respectively. Spiroxamine diastereomers A and B were determined by GC/IT-MS, and a matrix effect was observed in the case of grapes but not in must and wine. Recovery of spiroxamine from fortified samples at 0.02 to 5.0 mg/kg ranged from 78–102% for grapes and must, with relative standard deviation (RSD) <13%; for red and white wines, recoveries ranged from 90 to 101% with RSD <9%. The limit of quantification was 0.02 mg/kg for grapes, must, and wine or 0.10 mg/kg for grapes, depending on the extraction procedure used.

Chemical ionization of substituted naphthalenes using tetrahydrofuran as a reagent in gas chromatography with ion trap mass spectrometry

2003 ◽  
Vol 17 (8) ◽  
pp. 811-815 ◽  
Author(s):  
Shin-Hwa Tzing ◽  
Anil Ghule ◽  
Jia-Yaw Chang ◽  
Yong-Chien Ling
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Ionization ◽  
Ion Trap ◽  
Ion Trap Mass Spectrometry
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