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.
| Original language | Undefined/Unknown |
|---|---|
| Pages (from-to) | 466–472 |
| Number of pages | 7 |
| Journal | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
| Volume | 103 |
| Issue number | 4 |
| Publication status | Published - 1995 |
| MoE publication type | A1 Journal article-refereed |