Heteroelemental diatomic secondary ions as a probe for molecular states |
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Authors: | J. Goschnick M. Lipp H. J. Ache |
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Affiliation: | (1) Institut für Radiochemie, Kernforschungszentrum Karlsruhe, Postfach 36 40, W-7500 Karlsruhe, Germany |
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Abstract: | Summary The complete chemical characterization of environmental particles requires a depth resolved analysis of the chemical state of the elements. Using dynamic SIMS, a depth-resolved determination of the chemical state of chromium was derived from measurements of ten different chromium salts and oxides. The evaluation is based on the signals of Cr2+, CrO+ and Cr2O+ which are the most intense molecular ions. The valence state of chromium can be determined for concentrations far less than 1 atom %. The transferability of this kind of analysis is shown for manganese compounds. Additionally binary mixed metal clusters are shown to indicate binding partners of compounds in mixtures. |
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