Abstract
In this report, the authors describe the first successful coupling of an atmospheric-pressure He ICP to a commercial ICP-MS system. Minor modifications of the load coil and the plasma impedance matching network were made to sustain the annular He ICP in a low-gas-flow torch at a forward power of 500-900 W and a total gas flow of 8 L/min. The objectives of this work were to investigate the feasibility of using a mass spectrometer for fundamental studies in He ICPs and to explore the analytical capabilities of the He ICP-MS system for the determination of halogens and sulfur. Except for this report on the He ICP and an earlier study with an Ar-N/sub 2/ICP all previous investigations of ICP mass spectrometry have been concerned with Ar discharges.
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