Comparison of the Dynamic Thermal Gradient to Temperature-Programmed Conditions in Gas Chromatography Using a Stochastic Transport Model

2021 ◽  
Vol 93 (34) ◽  
pp. 11785-11791
Author(s):  
Samuel Avila ◽  
H. Dennis Tolley ◽  
Brian D. Iverson ◽  
Aaron R. Hawkins ◽  
Shawn L. Johnson ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Thermal Gradient ◽  
Transport Model ◽  
Stochastic Transport ◽  
Temperature Programmed

Comparison of Static Thermal Gradient to Isothermal Conditions in Gas Chromatography Using a Stochastic Transport Model

2021 ◽  
Vol 93 (17) ◽  
pp. 6739-6745
Author(s):  
Samuel Avila ◽  
H. Dennis Tolley ◽  
Brian D. Iverson ◽  
Aaron R. Hawkins ◽  
Nathan L. Porter ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Thermal Gradient ◽  
Transport Model ◽  
Isothermal Conditions ◽  
Stochastic Transport

Application of a Mass Balance-Based Stochastic Transport Model

2010 ◽  
Vol 14 (3) ◽  
pp. 170-177
Author(s):  
Benjamin W. Johnson ◽  
Andrew Curtis Elmore ◽  
Jeffrey D. Cawlfield
Keyword(s):  
Mass Balance ◽  
Transport Model ◽  
Stochastic Transport

Chemical Composition of Technical Chlordane

1976 ◽  
Vol 59 (3) ◽  
pp. 696-702 ◽  
Author(s):  
William P Cochrane ◽  
Roy Greenhalgh
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Electron Capture Detection ◽  
Organochlorine Insecticide ◽  
Flame Ionization Detection ◽  
Reference Standard ◽  
Peak Overlap ◽  
Flame Ionization ◽  
Temperature Programmed

Abstract Technical chlordane, a multicomponent organochlorine insecticide, was separated into 26 peaks by temperature-programmed gas chromatography, using a 3% OV-17 column. Peaks were identified by using combined gas chromatography-mass spectrometry (GLC-MS) and, where individual standards were available, by comparing retention times on various columns. Technical chlordane constituents were also investigated by GLC-MS, using a Dexsil 300 column; 19–20 peaks were observed. Quantitation studies indicated differences in the per cent contributions of the constituents, particularly for heptachlor and trans-chlordane, in 2 different technical chlordane reference standards. For the same reference standard higher results were obtained by using 63Ni electron capture detection than by using flame ionization detection. By using a combination of 4 GLC columns to overcome peak overlap, we determined that the 11 known constitutents of technical chlordane constituted approximately 40%.

Closed-Loop, Axial Temperature Control of Etched Silicon Microcolumn for Tunable Thermal Gradient Gas Chromatography

2020 ◽  
Vol 29 (1) ◽  
pp. 76-85
Author(s):  
Parker D. Schnepf ◽  
Aaron Davis ◽  
Brian D. Iverson ◽  
Richard Vanfleet ◽  
Robert C. Davis ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Temperature Control ◽  
Thermal Gradient ◽  
Closed Loop ◽  
Axial Temperature ◽  
Etched Silicon
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