A simple multimode size exclusion chromatographic method for the determination of the degree of thermal treatment of fossil fuel pyrolysis products

1993 ◽  
Vol 7 (3) ◽  
pp. 357-361 ◽  
Author(s):  
Arthur L. Lafleur ◽  
Adel F. Sarofim ◽  
Mary J. Wornat
Keyword(s):  
Thermal Treatment ◽  
Chromatographic Method ◽  
Fossil Fuel ◽  
Size Exclusion ◽  
Pyrolysis Products ◽  
Size Exclusion Chromatographic ◽  
Fuel Pyrolysis

scholarly journals Size Exclusion Chromatographic Cleanup for GC/MS Determination of Organophosphorus Pesticide Residues in Household and Vehicle Dust

2002 ◽  
Vol 85 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Thomas F Moate ◽  
Matthew Furia ◽  
Cynthia Curl ◽  
Juan F Muniz ◽  
Jianbo Yu ◽  
...  
Keyword(s):  
Organophosphorus Pesticides ◽  
Organophosphorus Pesticide ◽  
Fruit Production ◽  
Size Exclusion ◽  
Gas Chromatography Mass Spectrometry ◽  
Selected Ion Monitoring ◽  
Size Exclusion Chromatographic ◽  
Tree Fruit ◽  
Exclusion Chromatography

Abstract Size exclusion chromatography (SEC) was used as a cleanup method for the analysis of organophosphorus pesticides in household and vehicle dusts. The pesticides investigated were diazinon, methyl parathion, chlorpyrifos, malathion, phosmet, and azinphosmethyl. These compounds are of interest due to their use in agricultural tree fruit production and/or urban pest control. Pesticides were determined via gas chromatography/mass spectrometry with selected-ion monitoring and cool on-column injection. The lower limit of method validation was 0.20 μg/g. Method limits of detection in dust ranged from 0.012–0.055 μg/g. Dust samples were collected with vacuums from the homes and vehicles of people living and working in a rural agricultural region in the central part of Washington State. The analytes were extracted from the dust by sonication in acetone. The extracts were solvent-exchanged to cyclohexane, frozen, thawed, and centrifuged prior to SEC injection. Following SEC, the eluent was split into 2 fractions, concentrated, and injected on-column into the gas chromatograph. This method represents the first complete publication describing the SEC cleanup of organophosphorus pesticides in dusts. Recoveries of pesticides in dusts ranged from 63.5–110.8 ± 4.9–19.6% over a fortification range of 0.20–10.00 μg/g. This optimized, automated, and reproducible SEC method does not require further treatment or cleanup for trace determination of these organophosphorus pesticides.

Aqueous size-exclusion chromatographic method for the quantification of cyanobacterial native glycogen

2013 ◽  
Vol 930 ◽  
pp. 90-97 ◽  
Author(s):  
Yoshihiro Izumi ◽  
Shimpei Aikawa ◽  
Fumio Matsuda ◽  
Tomohisa Hasunuma ◽  
Akihiko Kondo
Keyword(s):  
Chromatographic Method ◽  
Size Exclusion ◽  
Size Exclusion Chromatographic

Triple Helix Formation on Plasmid DNA Determined by a Size-Exclusion Chromatographic Method

1997 ◽  
Vol 248 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Virginie Escriou ◽  
Delphine Lagneaux ◽  
Joël Crouzet ◽  
Pierre Wils ◽  
Daniel Scherman
Keyword(s):  
Plasmid Dna ◽  
Triple Helix ◽  
Chromatographic Method ◽  
Size Exclusion ◽  
Helix Formation ◽  
Size Exclusion Chromatographic ◽  
Triple Helix Formation
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