Townsend discharge nitric oxide chemical ionization gas chromatography/mass spectrometry for hydrocarbon analysis of the middle distillates

1992 ◽  
Vol 64 (19) ◽  
pp. 2227-2232 ◽  
Author(s):  
Ismet. Dzidic ◽  
H. A. Petersen ◽  
P. A. Wadsworth ◽  
H. V. Hart
Keyword(s):  
Nitric Oxide ◽  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Ionization ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Hydrocarbon Analysis ◽  
Middle Distillates ◽  
Townsend Discharge

Irace Level Detection of Chlorinated Paraffins in Biological and Environmental Samples, Using Gas Chromatography/Mass Spectrometry with Negative-Ion Chemical Ionization

1985 ◽  
Vol 68 (3) ◽  
pp. 427-430
Author(s):  
Peter P Schmid ◽  
Markus D Muller
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Environmental Samples ◽  
Chemical Ionization ◽  
Negative Ion ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Biological And Environmental Samples ◽  
Chlorinated Paraffins ◽  
Negative Ion Chemical Ionization

Abstract A method is described for detection of chlorinated paraffins (CPs) in biological and environmental samples. Sample preparation includes sulfuric acid treatment followed by adsorption chromatography on ilumina, which yields the CPs in one fraction that is almost free of interfering material. Using gas chromatography/mass spectrometry j with negative-ion chemical ionization, the limit of detection is 5 ng (corresponding to the lower ppb range). CP levels of 30 ppm, 200 ppb, ' and 5 ppb were found in sewage sludge, human fat, and sediment, respectively.

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