Compositional analysis of intact alkyl esters in leaf epicuticular wax of swede by capillary gas chromatography and electron-impact mass spectrometry

1995 ◽  
Vol 6 (2) ◽  
pp. 65-73 ◽  
Author(s):  
T. Shepherd ◽  
G. W. Robertson ◽  
D. W. Griffiths
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Electron Impact ◽  
Capillary Gas Chromatography ◽  
Compositional Analysis ◽  
Electron Impact Mass Spectrometry ◽  
Alkyl Esters ◽  
Electron Impact Mass ◽  
Leaf Epicuticular Wax ◽  
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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