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The development of reference materials for nutrients in seawater (RMNS) started in 1993, and production and distribution of RMNS began in 2000. In 2011, KANSO TECHNOS CO., LTD. (KANSO) became accredited as a reference material producer (International Organization for Standardization, ISO 17034). Since then, RMNS has been distributed worldwide as an SI-traceable certified reference material. RMNS (1) is 100% natural seawater (no additives); (2) contains all nutrients in one bottle; (3) is used directly without any dilution step; (4) is available as several lots of low to high nutrient concentrations; and (5) has guaranteed homogeneity and stability for 7 years. With the current measurement precision, we now can obtain homogeneity results of 0.1 to 0.2% at mid- to high-nutrient-concentration ranges. In this chapter, RMNS's development history, production and certification method are described.

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Production History of Certified Reference Materials of Nutrients in Seawater Developed by KANSO TECHNOS CO., LTD.

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  • 出版模式：

    开放获取

  • 发表日期：

    2025年

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  • Hitoshi Mitsuda,
  • Takeshi Fujii,
  • Chisato Nagaya,
  • Naoyuki Tahara

摘要

The development of reference materials for nutrients in seawater (RMNS) started in 1993, and production and distribution of RMNS began in 2000. In 2011, KANSO TECHNOS CO., LTD. (KANSO) became accredited as a reference material producer (International Organization for Standardization, ISO 17034). Since then, RMNS has been distributed worldwide as an SI-traceable certified reference material. RMNS (1) is 100% natural seawater (no additives); (2) contains all nutrients in one bottle; (3) is used directly without any dilution step; (4) is available as several lots of low to high nutrient concentrations; and (5) has guaranteed homogeneity and stability for 7 years. With the current measurement precision, we now can obtain homogeneity results of 0.1 to 0.2% at mid- to high-nutrient-concentration ranges. In this chapter, RMNS's development history, production and certification method are described.