Calibration of the Submersible Ultraviolet Nitrate Analyzer (SUNA) by using Reference Material for Nutrients in Seawater (RMNS)

Hiroshi Uchida, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Tetsuichi Fujiki, JAMSTEC, Yokosuka, Japan, Shigeto Nishino, JAMSTEC, Yokosuku, Japan, Michio Aoyama, Institute of Environmental Radioactivity, Fukushima University, Fukushima, Japan, Tomomi Sone, Marine Works Japan, Japan and Akihiko Murata, Japan Agency for Marine-Earth Science and Technology, Research & Development Center for Global Change, Yokosuka, Japan