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Reference Materials for Nutrients in Seawater Michio Aoyama maoyama@mri-jma.go.jp

Reference Materials for Nutrients in Seawater Michio Aoyama maoyama@mri-jma.go.jp Meteorological Research Institute (MRI) Hidekazu Ota General Environmental Technos Co.Ltd. Natural seawater matrix Stable at room temperature for >five years Homogeneity equivalent to precision of <0.2%

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Reference Materials for Nutrients in Seawater Michio Aoyama maoyama@mri-jma.go.jp

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  1. Reference Materials for Nutrients in Seawater Michio Aoyama maoyama@mri-jma.go.jp Meteorological Research Institute (MRI) Hidekazu Ota General Environmental Technos Co.Ltd

  2. Natural seawater matrix • Stable at room temperature for >five years • Homogeneity equivalent to precision of <0.2% • All determinands in one bottle • Range of materials representative of 95% of the worlds ocean in volume terms • Batches of 6000 bottles possible

  3. Price $40 bottle

  4. Terms of Reference IOC/ICES study group • Develop and establish Reference Materials for Nutrients in Seawater (RMNS) collaborating with producers. • National Metrology Institute of Japan certification of RMNS • Revised nutrients analysis manual • Revised sampling and measurement protocols using the RMNS • International exercise to verify the stability of the reference material, 2009-2011 (11 labs) • Including testing of the protocols • Distribute 10,000 bottles of RMNS to laboratories to be used by the Repeat Hydrography Programme • Construct a nutrient dataset referenced to the new RMNS • Promote global use of RMNS

  5. Revised procedures GO-SHIP http//cdiac3.ornl.gov/hydrography

  6. Further information Michio Aoyama maoyama@mri-jma.go.jp David Hydes djh@noc.soton.ac.uk Field experience Susan Becker - Scripps ODF Karel Bakker and Jan van Ooijen - NIOZ Other developments Mercury free DIC/TA CRM – Andrew Dickson DOM - Jonathan Sharp & Takeshi Yoshimura

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