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

Authors: Motley, Curtis B.; Ashraf-Khorassani, Mehdi; Long, Gary L.

Source: Applied Spectroscopy, Volume 43, Issue 5, Pages 737-891 (July 1989) , pp. 737-741(5)

Publisher: Society for Applied Spectroscopy

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Abstract:

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-hand emission signal with 100% CO2 and a methanol modifier up to 5% are presented.

Keywords: Atomic emission spectrometry; Microwave-induced plasma; Packed column; Supercritical fluid chromatography

Document Type: Rapid Communication

DOI: http://dx.doi.org/10.1366/0003702894202238

Affiliations: Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

Publication date: July 1, 1989

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