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

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: K-E. Saarela, J-O. Lill, F.J. Hernberg, L. Harju, A. Lindroos, S-J. Heselius
Publisher: ELSEVIER SCIENCE BV
Publication year: 1995
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Journal acronym: NUCL INSTRUM METH B
Volume number: 103
Issue number: 4
Start page: 466
End page: 472
Number of pages: 7
ISSN: 0168-583X


Abstract

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.

Last updated on 2019-13-12 at 03:39