Preconcentration of trace elements in biological materials by dry ashing for TTPIXE analysis A study of matrix effects

K-E Saarela, Jan-Olof Lill, FJ Hernberg, L. Harju, A. Lindroos, S-J Heselius

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    Trace elements in biological materials were preconcentrated by dry ashing at 550 degrees C in order to improve the detection limits for thick-target PIXE analyses. The analytical procedure was calibrated with equally prepared ashes of certified biological standard reference materials (SRMs). The matrix effects were studied both theoretically and experimentally. A drawback of the ashing procedure is that volatile elements such as halogenides and sulfur can be partly lost depending on the composition of the material studied. Thick-target PIXE combined with dry ashing is a sensitive and reliable technique for the determination of elements with atomic number > 20 in biological materials with a low ash content.
    Original languageUndefined/Unknown
    Pages (from-to)466–472
    Number of pages7
    JournalNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
    Issue number4
    Publication statusPublished - 1995
    MoE publication typeA1 Journal article-refereed

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