Measurement of isotope ratios in organic compounds at picomole quantities by capillary gas chromatography/quadrupole electron impact mass spectrometry

1985 ◽  
Vol 12 (9) ◽  
pp. 560-564 ◽  
Author(s):  
F. Stellaard ◽  
G. Paumgartner
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Electron Impact ◽  
Organic Compounds ◽  
Capillary Gas Chromatography ◽  
Isotope Ratios ◽  
Electron Impact Mass Spectrometry ◽  
Electron Impact Mass ◽  
Impact Mass

Confirmation of Levamisole Residues in Cattle and Swine Livers by Capillary Gas Chromatography-Electron Impact Mass Spectrometry

1988 ◽  
Vol 71 (6) ◽  
pp. 1150-1153 ◽  
Author(s):  
Steven J Stout ◽  
Adrian R Dacunha ◽  
Robert E Tondreau ◽  
John E Boyd
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Electron Impact ◽  
Capillary Gas Chromatography ◽  
Fused Silica ◽  
Electron Impact Mass Spectrometry ◽  
Fused Silica Capillary ◽  
Electron Impact Mass ◽  
Silica Capillary Column ◽  
Impact Mass

Abstract Capillary gas chromatography-electron impact mass spectrometry is used to confirm the presence of levamisole in cattle and swine livers at the 0.1 ppm tolerance level. Use of a fused silica capillary column from injector to detector solved chromatographic problems encountered with the analyte. Of the mass specrrometric techniques evaluated, electron impact mass spectrometry provided the most satisfactory data for a confirmatory method. Recoveries from swine and cattle livers fortified at 0.1 ppm averaged 74.9 and 72.7%, respectively, indicating potential utility of this methodology as a quantitative method. Apparent levamisole residues in control livers were less than 0.01 ppm

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