This title appears in the Scientific Report :
1999
Please use the identifier:
http://dx.doi.org/10.1039/A809252D in citations.
Determination of long-lived radionuclides by inductively coupled plasma quadrupole mass spectrometry using different nebulizers
Determination of long-lived radionuclides by inductively coupled plasma quadrupole mass spectrometry using different nebulizers
Different nebulizers (cross-flow, ultrasonic and two microconcentric nebulizers) were used for sample introduction of radioactive solutions into a quadrupole-based inductively coupled plasma mass spectrometer (ICP-QMS). The best sensitivity (from 420 to 850 MHz, which is about one order of magnitude...
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Personal Name(s): | Becker, J. S. |
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Soman, R. S. / Sutton, K. L. / Caruso, J. A. / Dietze, H.-J. | |
Contributing Institute: |
Zentralabteilung für Chemische Analysen; ZCH |
Published in: | Journal of analytical atomic spectrometry, 14 (1999) S. 933 - 937 |
Imprint: |
Cambridge
ChemSoc
1999
|
Physical Description: |
933 - 937 |
DOI: |
10.1039/A809252D |
Document Type: |
Journal Article |
Research Program: |
Entwicklung analytischer Verfahren |
Series Title: |
Journal of Analytical Atomic Spectrometry
14 |
Subject (ZB): | |
Publikationsportal JuSER |
Different nebulizers (cross-flow, ultrasonic and two microconcentric nebulizers) were used for sample introduction of radioactive solutions into a quadrupole-based inductively coupled plasma mass spectrometer (ICP-QMS). The best sensitivity (from 420 to 850 MHz, which is about one order of magnitude higher in comparison with the crossflow nebulizer) for long-lived radionuclides (Ra-226, Th-230, Np-237, U-238 and Am-241) was observed using the ultrasonic nebulizer. However, using the ultrasonic nebulizer, a significantly higher sample size (26-fold) in comparison with the micronebulizers is required. Sample introduction by micronebulization with a small sample size in the low picogram range is the method of choice for the determination of long-lived radionuclides. The precision of determination of a 10 ng l(-1) concentration was in the low-% range (and sub-% range) for all measurements using different nebulizer types. The detection limits for the determination of long-lived radionuclides in aqueous solutions applying the different nebulizers were 0.01-0.6 ng l(-1). The flow injection analysis approach was optimized for isotope dilution analysis of Th-232 (using 20 mu l of 5 mu g l(-1) Th-230) by ICP-QMS. The isotopic abundance ratios of Th-230-Th-232 isotope mixtures (Th-230/Th-232 = 0.01, 0.001 and 0.0001) were determined using a microconcentric nebulizer and 1 mu g l(-1) Th solutions with a relative external standard deviation of long-term stability measurements (over 20 h) of 0.17, 0.62 and 2.66%, respectively. |