Determination of naturally occurring radionuclides in ultrapure organic liquids |
| |
Authors: | R v Hentig T Goldbrunner F v Feilitzsch and G Angloher |
| |
Institution: | (1) Technische Universit?t München, Physik Department E15, James Franck Stra?e, D-85748 Garching, XX |
| |
Abstract: | For the determination of trace elements in organic liquids radiochemical neutron activation analysis has been combined with
counting methods geared to various decay modes of indicator radionuclides leading to a high sensitivity required for ultrapure
samples. The activation parameters such as irradiation time, sample mass and neutron flux have been enlarged to the maximum
possible in the available irradiation facility. Separation yields and adsorption losses have been studied in detail for a
set of elements in order to rule out losses during the separation process. The attainable limits of detection are 2 · 10–16g/g for U and Lu, in the 5 · 10–15g/g range for Th and Sm, in the 1 · 10–14g/g region for La, 5 · 10–13g/g for Rb, Cd and 2 · 10–12g/g for K and In. Although the analysis focused on traces of naturally occurring radioisotopes, results for Cr, Fe, W and
Zn are presented as well.
Received: 14 May 1997 / Revised: 28 August 1997 / Accepted: 9 September 1997 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|