The University of Southampton
University of Southampton Institutional Repository

GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 1: reproducibility of results for the international intercomparison

GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 1: reproducibility of results for the international intercomparison
GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 1: reproducibility of results for the international intercomparison
One of the key activities during the initial phase of the international GEOTRACES program was an extensive international intercalibration effort, to ensure that results for a range of trace elements and isotopes (TEIs) from different cruises and from different laboratories can be compared in a meaningful way. Here we present the results from the intercalibration efforts on neodymium isotopes and rare earth elements in seawater and marine particles. Fifteen different laboratories reported results for dissolved 143Nd/144Nd ratios in seawater at three different locations (BATS 15 m, BATS 2000 m, SAFe 3000 m), with an overall agreement within 47 to 57 ppm (2? standard deviation of the mean). A similar agreement was found for analyses of an unknown pure Nd standard solution carried out by 13 laboratories (56 ppm), indicating that mass spectrometry is the main variable in achieving accurate and precise Nd isotope ratios. Overall, this result is very satisfactory, as the achieved precision is a factor of 40 better than the range of Nd isotopic compositions observed in the global ocean. Intercalibration for dissolved rare earth element concentrations (REEs) by six laboratories for two water depths at BATS yielded a reproducibility of 15% or better for all REE except Ce, which seems to be the most blank-sensitive REE. Neodymium concentrations from 12 laboratories show an agreement within 9%, reflecting the best currently possible reproducibility. Results for Nd isotopic compositions and REE concentrations on marine particles are inconclusive, and should be revisited in the future.
1541-5856
234-251
van de Flierdt, Tina
6322ca73-69d3-434e-bf6d-41376bd93b73
Pahnke, Katharina
7745025d-b534-4731-bfa6-d4d45300d0ff
Amakawa, Hiroshi
debaa3a1-aa7f-4f55-adca-a69caa42cb15
Andersson, Per
04cd3cbf-11be-4620-87cb-4323cec67b38
Basak, Chandranath
250444cd-f866-4681-936a-934a97d67046
Coles, Barry
bdd8804e-609b-4ef7-957a-e04b6f95a389
Colin, Christophe
f277ae6f-3cce-4bdb-a1a8-1533fc75e8c2
Crocket, Kirsty
b68e17a2-6bf9-45de-be60-4c5c6cc93a34
Frank, Martin
09ec65ac-f62d-41da-86b2-81908973b8a1
Frank, Norbert
988d5954-895c-4226-bc51-998988810730
Stichel, Torben
c04e16ca-782d-47af-b955-7bbdd9e7f91d
van de Flierdt, Tina
6322ca73-69d3-434e-bf6d-41376bd93b73
Pahnke, Katharina
7745025d-b534-4731-bfa6-d4d45300d0ff
Amakawa, Hiroshi
debaa3a1-aa7f-4f55-adca-a69caa42cb15
Andersson, Per
04cd3cbf-11be-4620-87cb-4323cec67b38
Basak, Chandranath
250444cd-f866-4681-936a-934a97d67046
Coles, Barry
bdd8804e-609b-4ef7-957a-e04b6f95a389
Colin, Christophe
f277ae6f-3cce-4bdb-a1a8-1533fc75e8c2
Crocket, Kirsty
b68e17a2-6bf9-45de-be60-4c5c6cc93a34
Frank, Martin
09ec65ac-f62d-41da-86b2-81908973b8a1
Frank, Norbert
988d5954-895c-4226-bc51-998988810730
Stichel, Torben
c04e16ca-782d-47af-b955-7bbdd9e7f91d

van de Flierdt, Tina, Pahnke, Katharina, Amakawa, Hiroshi, Andersson, Per, Basak, Chandranath, Coles, Barry, Colin, Christophe, Crocket, Kirsty, Frank, Martin, Frank, Norbert and Stichel, Torben (2012) GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 1: reproducibility of results for the international intercomparison. Limnology and Oceanography: Methods, 10, 234-251. (doi:10.4319/lom.2012.10.234).

Record type: Article

Abstract

One of the key activities during the initial phase of the international GEOTRACES program was an extensive international intercalibration effort, to ensure that results for a range of trace elements and isotopes (TEIs) from different cruises and from different laboratories can be compared in a meaningful way. Here we present the results from the intercalibration efforts on neodymium isotopes and rare earth elements in seawater and marine particles. Fifteen different laboratories reported results for dissolved 143Nd/144Nd ratios in seawater at three different locations (BATS 15 m, BATS 2000 m, SAFe 3000 m), with an overall agreement within 47 to 57 ppm (2? standard deviation of the mean). A similar agreement was found for analyses of an unknown pure Nd standard solution carried out by 13 laboratories (56 ppm), indicating that mass spectrometry is the main variable in achieving accurate and precise Nd isotope ratios. Overall, this result is very satisfactory, as the achieved precision is a factor of 40 better than the range of Nd isotopic compositions observed in the global ocean. Intercalibration for dissolved rare earth element concentrations (REEs) by six laboratories for two water depths at BATS yielded a reproducibility of 15% or better for all REE except Ce, which seems to be the most blank-sensitive REE. Neodymium concentrations from 12 laboratories show an agreement within 9%, reflecting the best currently possible reproducibility. Results for Nd isotopic compositions and REE concentrations on marine particles are inconclusive, and should be revisited in the future.

Full text not available from this repository.

More information

Published date: April 2012
Organisations: Geochemistry

Identifiers

Local EPrints ID: 368787
URI: http://eprints.soton.ac.uk/id/eprint/368787
ISSN: 1541-5856
PURE UUID: a2e74f6f-4ad5-485a-83fa-92a09d6d2d71

Catalogue record

Date deposited: 16 Sep 2014 09:40
Last modified: 15 Jul 2019 21:45

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×