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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: K-E. Saarela, J-O. Lill, F.J. Hernberg, L. Harju, A. Lindroos, S-J. Heselius
Förläggare: ELSEVIER SCIENCE BV
Publiceringsår: 1995
Tidskrift: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Tidskriftsakronym: NUCL INSTRUM METH B
Volym: 103
Nummer: 4
Artikelns första sida, sidnummer: 466
Artikelns sista sida, sidnummer: 472
Antal sidor: 7
ISSN: 0168-583X


Abstrakt

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.

Senast uppdaterad 2019-07-12 vid 03:42