Reference Materials for Nutrients in Seawater

Michio Aoyamamaoyama@mri-jma.go.jp

Meteorological Research Institute (MRI)

Hidekazu OtaGeneral Environmental Technos Co.Ltd

•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

doorway

Line flow of seawater

Clean bench Walk - in Autoclave

Air shower gate

Pass box

Line flow of workers

Seawater Storage room

Clean room

Cooling room

Preparation room

Filtration room

Clean - packed bottles

bottler assistant

recorder

labeler vacuum

Bottling room RMNS

Stainless - steel container （ 200 Ｌ）

Price $40 bottle

Terms of ReferenceIOC/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

Revised procedures

GO-SHIP

http//cdiac3.ornl.gov/hydrography

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