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The direct introduction of aqueous samples into a low-power microwave plasma is achieved with the use of a highly efficient TM010 microwave plasma. A toroidal plasma is sustained in the cavity solely by the Ar gas output of the nebulizer. Samples from a concentric glass nebulizer/Scott
type spray chamber are fed directly into the cavity with no desolvation apparatus. A toroidal plasma can be sustained from the output of the nebulizer while 1 mL/min water is being aspirated at power levels of 36 W. This plasma is characterized as an atom cell by the study of emission profiles,
working curves, and limits of detection. Also, ionization and vaporization interferences that occur with the use of this plasma are discussed.
Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
Publication date: August 1, 1987
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)