Feasibility of screening large aqueous samples for thermally unstable pesticides using high efficiency packed column supercritical fluid chromatography with multiple detectors

1995 ◽  
Vol 41 (5-6) ◽  
pp. 471-484 ◽  
Author(s):  
T. A. Berger
Keyword(s):  
Supercritical Fluid ◽  
Supercritical Fluid Chromatography ◽  
High Efficiency ◽  
Packed Column ◽  
Aqueous Samples ◽  
Multiple Detectors

Microwave-Induced Plasma as an Elemental Detector for Packed-Column Supercritical Fluid Chromatography

1989 ◽  
Vol 43 (5) ◽  
pp. 737-741 ◽  
Author(s):  
Curtis B. Motley ◽  
Mehdi Ashraf-Khorassani ◽  
Gary L. Long
Keyword(s):  
Supercritical Fluid ◽  
Supercritical Fluid Chromatography ◽  
High Efficiency ◽  
Broad Band ◽  
Packed Column ◽  
Emission Signal ◽  
Microwave Induced Plasma ◽  
Toroidal Plasma ◽  
Broad Band Emission ◽  
Band Emission

The direct introduction of supercritical fluid chromatography effluent from a packed DeltaBond 300 phenyl column with the MIP as an elemental detector, using a high efficiency TM010 cavity, has been employed for SFC separations. A toroidal plasma is sustained in the cavity by using an ICP type torch and an argon auxiliary flow (2 L/min) over all pressures (1500–5000 psi). Methanol modifier concentrations (0–5%) have also been studied. Studies of the effects of CO2 on excitation temperature, electron number density, and analyte emission signals are presented. In addition, the background broad-band emission signal with 100% CO2 and a methanol modifier up to 5% are presented.

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