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dc.contributor.author
Aoyama Michio
dc.contributor.author
Abad, Mara
dc.contributor.author
Anstey, Carol
dc.contributor.author
Ashraf, Muhamed
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Bakir, Adil
dc.contributor.author
Solis, Miriam Edith
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Becker, Susan
dc.contributor.author
Bell, Steven
dc.contributor.author
Berdalet, Elisa
dc.contributor.author
Blum, Marguerite
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Briggs, Rebecca
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Caradec, Florian
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Cariou, Thierry
dc.contributor.author
Church, Matt
dc.contributor.author
Coppola, Laurent
dc.contributor.author
Crump, Mike
dc.contributor.author
Curless, Susan
dc.contributor.author
Dai, Minhan
dc.contributor.author
Daniel, Anne
dc.contributor.author
Davis, Clare
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de Santis Braga, Elisabete
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Ekern, Lindsey
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Faber, David
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Fraser, Tamara
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Gundersen, Kjell
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Jacobsen, Sólvá
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Knockaert, Marc
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Komada, Taketoshi
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Kralj, Martina
dc.contributor.author
Kramer, Rita
dc.date.available
2020-05-29T20:18:13Z
dc.date.issued
2016
dc.identifier.citation
Aoyama Michio; Abad, Mara; Anstey, Carol; Ashraf, Muhamed; Bakir, Adil; et al.; IOCCP-JAMSTEC 2015 Inter-laboratory calibration exercise of a certified reference material for nutrients in seawater; Japan Agency for Marine-Earth Science and Technology; 2016; 178
dc.identifier.isbn
978-4-901833-23-3
dc.identifier.uri
http://hdl.handle.net/11336/106279
dc.description.abstract
The objective of this inter-laboratory calibration exercise is to evaluate and improve comparability of global nutrients data in the world ocean. IOCCP and JAMSTEC co-organized an inter-laboratory calibration exercise of nutrients in seawater using four lots of recently certified RM produced by KANSO and three CRMs provided by National Metrology Institute of Japan which are certified in Marine 2014. 71 laboratories in 28 countries had replied to the call for participants. Results were returned from 59 laboratories. Korean Institute of Ocean Science and Technology, KIOST, also offered to provide their recently developed RMs to this I/C exercise. The Royal Netherlands Institute for Sea Research, NIOZ, also offers to provide silicate stock solution to contribute to the overall assessment of results regarding with this I/C exercise. Mean, median and standard deviation were calculated, robust mean and standard deviation were also calculated. Successive t-tests at the 95% confidence level were applied to the results before estimating the consensus mean, consensus median, and consensus standard deviation. Z-scores were also calculated to evaluate the performance of laboratories as in the previous inter-comparison studies. The ranked concentration plots for a particular nutrient would be proportional and roughly parallel to each other for samples with different nutrient concentrations if each laboratory appropriately compensated for the non-linearity of the calibration curves. However there are non-proportional results from some laboratories for all of the determinants as well as observed in the previous I/C studies. These results indicate that non-linearity of the calibration curves for nutrient analysis is one of significant sources of less comparability of nutrients data. This implies that we need to use a set of CRM of which nutrients concentrations can cover whole range of measurements of nutrients concentration to keep comparability of whole range of nutrients concentration in the world ocean. It is clear that present comparability among the participants in 2015 I/C exercise is quite similar with previously obtained comparability in 2012 I/C study and previous I/C studies. Consensus standard deviations of all determinands are one order of magnitude large rather than homogeneity of the CRMs distributed and consensus standard deviations are about double of reported precision of measurements of the laboratories. Therefore these I/C results show that use of CRM will be able to greatly improve comparability of nutrient data among the laboratories of the world. There are good signal in the results that although consensus standard deviations are relatively large, consensus median/mean of each samples showed good agreement with certified values of the samples within consensus SDs. This implies that majority of the participating laboratories have good capability to measure nutrients concentration in seawater and using CRM will increase more on the comparability and could be their results to be SI traceable quickly.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Japan Agency for Marine-Earth Science and Technology
dc.rights
info:eu-repo/semantics/closedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
NUTRIENTS
dc.subject
SEAWATER
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
IOCCP-JAMSTEC 2015 Inter-laboratory calibration exercise of a certified reference material for nutrients in seawater
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/book
dc.type
info:ar-repo/semantics/libro
dc.date.updated
2020-02-20T15:53:20Z
dc.journal.pagination
178
dc.journal.pais
Japón
dc.journal.ciudad
Yokosuka
dc.description.fil
Fil: Aoyama Michio. Fukushima University; Japón
dc.description.fil
Fil: Abad, Mara. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias del Mar; España
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Fil: Anstey, Carol. CSIRO Marine and Atmospheric Research; Australia
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Fil: Ashraf, Muhamed. Central Institute of Fisheries Technology; India
dc.description.fil
Fil: Bakir, Adil. University of Portsmouth; Reino Unido
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Fil: Solis, Miriam Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil
Fil: Becker, Susan. University of California at San Diego. Scripps Institution of Oceanography; Estados Unidos
dc.description.fil
Fil: Bell, Steven. Bermuda Institute of Ocean Science; Bermudas
dc.description.fil
Fil: Berdalet, Elisa. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias del Mar; España
dc.description.fil
Fil: Blum, Marguerite. Monterey Bay Aquarium Research Institute; Estados Unidos
dc.description.fil
Fil: Briggs, Rebecca. SOEST Laboratory for Analytical Biogeochemistry. University of Hawaii; Estados Unidos
dc.description.fil
Fil: Caradec, Florian. Ifremer; Francia
dc.description.fil
Fil: Cariou, Thierry. Université Pierre et Marie Curie; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Church, Matt. Hawaii Ocean Time-series; Estados Unidos
dc.description.fil
Fil: Coppola, Laurent. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Crump, Mike. National Institute of Water and Atmospheric Research; Nueva Zelanda
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Fil: Curless, Susan. Hawaii Ocean Time-series; Estados Unidos
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Fil: Dai, Minhan. Xiamen University. State Key laboratory of Marine Environmental Science; China
dc.description.fil
Fil: Daniel, Anne. Ifremer; Francia
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Fil: Davis, Clare. University of Liverpool; Reino Unido
dc.description.fil
Fil: de Santis Braga, Elisabete. Universidade de Sao Paulo; Brasil
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Fil: Ekern, Lindsey. University of California at San Diego. Scripps Institution of Oceanography; Estados Unidos
dc.description.fil
Fil: Faber, David. University of California at San Diego. Scripps Institution of Oceanography; Estados Unidos
dc.description.fil
Fil: Fraser, Tamara. Fisheries And Ocean Canada; Canadá
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Fil: Gundersen, Kjell. Institute of Marine Research; Noruega
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Fil: Jacobsen, Sólvá. Faroe Marine Research Institute; Dinamarca
dc.description.fil
Fil: Knockaert, Marc. Directorate Natural Environment. Ecosystems Physico-Chemistry; Bélgica
dc.description.fil
Fil: Komada, Taketoshi. University Of Tartu.; Estonia
dc.description.fil
Fil: Kralj, Martina. Istituto Nazionale di Oceanografía e Geofísica Sperimentale; Italia
dc.description.fil
Fil: Kramer, Rita. Bundesamt für Seeschifffahrt und Hydrographie. Laboratorium Sülldorf; Alemania
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.25607/OBP-419
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.oceanbestpractices.net/handle/11329/872
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