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Tytuł pozycji:

Determination of low-level 135 Cs and 135 Cs/ 137 Cs atomic ratios in large volume of seawater by chemical separation coupled with triple-quadrupole inductively coupled plasma mass spectrometry measurement for its oceanographic applications.

Tytuł :
Determination of low-level Cs atomic ratios in large volume of seawater by chemical separation coupled with triple-quadrupole inductively coupled plasma mass spectrometry measurement for its oceanographic applications.
Autorzy :
Zhu L; Technical University of Denmark, Department of Environmental Engineering, Risø Campus, Roskilde, DK-4000, Denmark.
Hou X; Technical University of Denmark, Department of Environmental Engineering, Risø Campus, Roskilde, DK-4000, Denmark. Electronic address: .
Qiao J; Technical University of Denmark, Department of Environmental Engineering, Risø Campus, Roskilde, DK-4000, Denmark.
Pokaż więcej
Źródło :
Talanta [Talanta] 2021 May 01; Vol. 226, pp. 122121. Date of Electronic Publication: 2021 Jan 21.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Publication: Amsterdam : Elsevier
Original Publication: Oxford : Pergamon Press
Contributed Indexing :
Keywords: (135)Cs/(137)Cs atomic Ratio; Selective leaching; Tracer; Water masses exchange
Entry Date(s) :
Date Created: 20210307 Date Completed: 20210317 Latest Revision: 20210317
Update Code :
20210318
DOI :
10.1016/j.talanta.2021.122121
PMID :
33676676
Czasopismo naukowe
Radioisotopes of cesium are powerful tracer for oceanographic studies. In this work, a novel method was developed for determination of ultra-low level 135 Cs and 137 Cs in seawater using triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS). Cesium was pre-concentrated from up to 45 L seawater samples using ammonium molybdophosphate (AMP) adsorption, following a selective leaching of cesium using Sr(OH) 2 . The cesium was further purified from interfering elements using AMP-PAN and cation-exchange chromatography. Sr(OH) 2 leaching was found to be an effective approach for selective exchange of cesium from the AMP sorbent without dissolution, which avoids the problem of separation of huge amount of NH 4 + and MoO 4 2- in the following steps. The decontamination factors for barium and rubidium with the developed method were more than 4 × 10 7 and 800, respectively. The separated 135 Cs and 137 Cs were measured using ICP-MS/MS by employing N 2 O as reaction gas to further elimination of isobaric (i.e. 135 Ba and 137 Ba) and polyatomic ions interferences. A detection limit of 1.5 × 10 -16  g L -1 for 135 Cs in seawater was achieved. The concentrations of 135 Cs in seawater from Baltic Sea, Danish straits and Roskilde Fjord were determined using the developed method to identify the sources of 135 Cs, the water masses exchange in this region was investigated using 135 Cs and 137 Cs.
(Copyright © 2021 Elsevier B.V. All rights reserved.)

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