Examination of a helium highly efficient microwave-induced plasma as an element-selective detector for supercritical fluid chromatography

The use of a highly efficient microwave-induced plasma as an element-selective detector for packed column supercritical fluid chromatography is discussed. The cavity is able to support an Ar or He discharge at powers of 150 W or less. The effects of the introduction of supercritical CO2 on the analytical parameters of the plasma are described and minimum detectable quantity values for S, P and Cl are presented.