Gas chromatographic/mass spectrometric analysis of human serum for non-ortho (coplanar) and ortho substituted polychlorinated biphenyls using isotope-dilution mass spectrometry

Chemosphere ◽  
1989 ◽  
Vol 19 (1-6) ◽  
pp. 127-134 ◽  
Author(s):  
D.G. Patterson ◽  
C.R. Lapeza ◽  
E.R. Barnhart ◽  
D.F. Groce ◽  
V.W. Burse
Keyword(s):  
Mass Spectrometry ◽  
Polychlorinated Biphenyls ◽  
Human Serum ◽  
Isotope Dilution ◽  
Isotope Dilution Mass Spectrometry ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Spectrometric Analysis ◽  
Chromatographic Mass

Gas Chromatographic-Mass Spectrometric Analysis, Identification, and Detection of Adulteration of Natural and Concentrated Lemon Oils

1982 ◽  
Vol 65 (1) ◽  
pp. 166-171
Author(s):  
Manfred J Prager ◽  
Michael A Miskiewicz
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Geranyl Acetate ◽  
Spectrometric Analysis ◽  
Glass Capillary ◽  
Chromatographic Mass

Abstract Lemon oils were characterized by quantitative glass capillary gas chromatography. Components present to the extent of more than 0.05% were measured and identified by mass spectrometry. In expressed lemon oils, monoterpenes and geranial were the only components present at concentrations of 1.0% or more. In concentrated lemon oils, β-caryophyllene, linalool, neral, β-terpineol, neryl acetate, and geranyl acetate were present in some samples in amounts of 1% or more. Adulteration was detected by component concentrations outside characteristic ranges for oils judged to be authentic.

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