A Moderate-Power Nitrogen Microwave-Induced Plasma as an Alternative Ion Source for Mass Spectrometry

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Abstract:

The moderate-power nitrogen plasma is evaluated as an alternative ion source for plasma mass spectrometry. The nitrogen MIP-MS exhibits linear dynamic ranges of about 3-4 orders of magnitude and low ppb to sub-ppb detection limits for most elements under multielement scanning conditions. Nitrogen MIP-MS is capable of determining K, Ca, Cr, As, and Se at their major isotopes. In addition, nitrogen MIP-MS provides lower detection limits than argon ICP-MS for K (0.48 ppb) and Ca (0.24 ppb). The nitrogen MIP-MS system allows the determination of isotope ratios for 10 ppm of Ca (40/44) and 100 ppb of K (39/41), Cr (52/53), and Se (80/78) with less than 5% error.

Keywords: Mass spectrometry; Microwave-induced plasma; Nitrogen plasma; Plasma mass spectrometry

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702904086623

Affiliations: 1: Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172 2: Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172; current address: Perkin-Elmer, Applied Sciences Division, 2771 N. Garey Ave., Pomona, California 91767 3: Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172; current address: U.S. EPA, 26 West ML King Drive, Cincinnati, Ohio 45268

Publication date: July 1, 1990

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