Publikationen

Method for U-236 Determination in Seawater Using Flow Injection Extraction Chromatography and Accelerator Mass Spectrometry

Autor(en)
Jixin Qiao, Xiaolin Hou, Peter Steier, Sven Nielsen, Robin Golser
Abstrakt

An automated analytical method implemented in a flow injection (FI) system was developed for rapid determination Of U-236 in 10 L seawater samples. U-238 was used as a chemical yield tracer for the whole procedure, in which extraction chromatography (UTEVA) was exploited to purify uranium, after an effective iron hydroxide coprecipitation. Accelerator mass spectrometry (ANIS) was applied for quantifying the U-236/U-238 ratio, and inductively coupled plasma mass spectrometry (ICPMS) was used to determine the absolute concentration of U-238; thus, the concentration of U-236 can be calculated. The key experimental parameters affecting the analytical effectiveness were investigated and optimized in order to achieve high chemical yields and simple and rapid analysis as well as low procedure background. Besides, the operational conditions for the target preparation prior to the ANIS measurement were optimized, on the basis of studying the coprecipitation behavior of uranium with iron hydroxide. The analytical results indicate that the developed method is simple and robust) providing satisfactory chemical yields (80-100%) and high analysis speed (4 h/sample), which could be an appealing alternative to conventional manual methods for U-236 determination in its tracer application.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Technical University of Denmark (DTU), Chinese Academy of Sciences (CAS)
Journal
Analytical Chemistry
Band
87
Seiten
7411-7417
Anzahl der Seiten
7
ISSN
0003-2700
DOI
https://doi.org/10.1021/acs.analchem.5b01608
Publikationsdatum
07-2015
Peer-reviewed
Ja
ÖFOS 2012
104002 Analytische Chemie, 103014 Kernphysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/method-for-u236-determination-in-seawater-using-flow-injection-extraction-chromatography-and-accelerator-mass-spectrometry(f9212e78-61d0-47ad-8c0a-1d68ebfc490a).html