1. 1. A. Knap, A. Michaels, A. Close, H. Ducklow, and A. Dickson, “Protocols for the Joint Global Ocean Flux Study (JGOFS) Core Measurements”, 1996, JGOFS Report No. 19, JGOFS, Woods Hole.
2. 2. M. Aoyama, H. Ota, M. Kimura, T. Kitao, H. Mitsuda, A. Murata, and K. Sato, Anal. Sci., 2012, 28, 911.
3. 3. B. C. Reynolds, M. Frank, and A. N. Halliday, Earth Planet Sci. Lett., 2006, 244, 431.
4. 4. Certificates for NMIJ CRM 7601-a, 7602-a and 7603-a, Compilation prepared by National Metrology Institute of Japan (NMIJ), https://www.nmij.jp/english/service/C/CRM_Catalog_(JE)160901.pdf.
5. 5. N. Nonose, C. Cheong, Y. Ishizawa, T. Miura, and A. Hioki, Anal. Chim. Acta, 2014, 840, 10.