An intercomparison of small- and large-volume techniques for thorium-234 in seawater
AbstractWe conducted an intercomparison of methods for the determination of 234Th in seawater. Samples were collected either from a shore-based 600 m water source, or from standard bottle casts collected in deep waters off Hawaii and in the Southern Ocean. We compared large volume techniques which r...
Published in: | Marine Chemistry |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2001
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/3505/ https://doi.org/10.1016/S0304-4203(00)00092-X https://hdl.handle.net/10013/epic.14089 |
id |
ftawi:oai:epic.awi.de:3505 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:3505 2023-09-05T13:23:29+02:00 An intercomparison of small- and large-volume techniques for thorium-234 in seawater Buesseler, K. O. Benitez-Nelson, C. Rutgers v. d. Loeff, Michiel Andrews, J. Ball, L. Crossin, G. Charette, M. A. 2001 https://epic.awi.de/id/eprint/3505/ https://doi.org/10.1016/S0304-4203(00)00092-X https://hdl.handle.net/10013/epic.14089 unknown Buesseler, K. O. , Benitez-Nelson, C. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 , Andrews, J. , Ball, L. , Crossin, G. and Charette, M. A. (2001) An intercomparison of small- and large-volume techniques for thorium-234 in seawater , Marine Chemistry, 74 (1), pp. 15-28 . doi:10.1016/S0304-4203(00)00092-X <https://doi.org/10.1016/S0304-4203%2800%2900092-X> , hdl:10013/epic.14089 EPIC3Marine Chemistry, 74(1), pp. 15-28 Article isiRev 2001 ftawi https://doi.org/10.1016/S0304-4203(00)00092-X 2023-08-22T19:44:03Z AbstractWe conducted an intercomparison of methods for the determination of 234Th in seawater. Samples were collected either from a shore-based 600 m water source, or from standard bottle casts collected in deep waters off Hawaii and in the Southern Ocean. We compared large volume techniques which rely upon Mn cartridges for the collection of dissolved 234Th and its detection via gamma counting (>200 liter samples) with small volume methods that employed either direct beta counting, or beta counting after radiochemical purification (2-20-Liter samples). Unique to this study are the presentation of a novel 2 and 5 liter 234Th methods. This new method is an adaptation of 20-liter methods which are based on a coprecipitation of thorium with Mn oxides and the direct beta counting of the precipitate. These Mn coprecipitation methods were found to be superior to other methods due to ease of sample collection and processing and low overall analytical uncertainties. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Marine Chemistry 74 1 15 28 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
AbstractWe conducted an intercomparison of methods for the determination of 234Th in seawater. Samples were collected either from a shore-based 600 m water source, or from standard bottle casts collected in deep waters off Hawaii and in the Southern Ocean. We compared large volume techniques which rely upon Mn cartridges for the collection of dissolved 234Th and its detection via gamma counting (>200 liter samples) with small volume methods that employed either direct beta counting, or beta counting after radiochemical purification (2-20-Liter samples). Unique to this study are the presentation of a novel 2 and 5 liter 234Th methods. This new method is an adaptation of 20-liter methods which are based on a coprecipitation of thorium with Mn oxides and the direct beta counting of the precipitate. These Mn coprecipitation methods were found to be superior to other methods due to ease of sample collection and processing and low overall analytical uncertainties. |
format |
Article in Journal/Newspaper |
author |
Buesseler, K. O. Benitez-Nelson, C. Rutgers v. d. Loeff, Michiel Andrews, J. Ball, L. Crossin, G. Charette, M. A. |
spellingShingle |
Buesseler, K. O. Benitez-Nelson, C. Rutgers v. d. Loeff, Michiel Andrews, J. Ball, L. Crossin, G. Charette, M. A. An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
author_facet |
Buesseler, K. O. Benitez-Nelson, C. Rutgers v. d. Loeff, Michiel Andrews, J. Ball, L. Crossin, G. Charette, M. A. |
author_sort |
Buesseler, K. O. |
title |
An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
title_short |
An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
title_full |
An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
title_fullStr |
An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
title_full_unstemmed |
An intercomparison of small- and large-volume techniques for thorium-234 in seawater |
title_sort |
intercomparison of small- and large-volume techniques for thorium-234 in seawater |
publishDate |
2001 |
url |
https://epic.awi.de/id/eprint/3505/ https://doi.org/10.1016/S0304-4203(00)00092-X https://hdl.handle.net/10013/epic.14089 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Marine Chemistry, 74(1), pp. 15-28 |
op_relation |
Buesseler, K. O. , Benitez-Nelson, C. , Rutgers v. d. Loeff, M. orcid:0000-0003-1393-3742 , Andrews, J. , Ball, L. , Crossin, G. and Charette, M. A. (2001) An intercomparison of small- and large-volume techniques for thorium-234 in seawater , Marine Chemistry, 74 (1), pp. 15-28 . doi:10.1016/S0304-4203(00)00092-X <https://doi.org/10.1016/S0304-4203%2800%2900092-X> , hdl:10013/epic.14089 |
op_doi |
https://doi.org/10.1016/S0304-4203(00)00092-X |
container_title |
Marine Chemistry |
container_volume |
74 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
28 |
_version_ |
1776204076596330496 |