Biological reference materials (RMs) for elemental speciation were prepared at the national Institute for Environmental Studies. A new human hair RM, prepared by cryogenic grinding using a ceramic disc mill, is certified for methylmercury, total Hg, Cd, Cu, Pb, Sb, Se and Zn, together with reference values for Al, Ag, As, Ba, Ca, Co, Fe, Mg, Mn, Na, S and V. Hijiki Seaweed RM was prepared for As speciation, particularly for use in the analysis of As(V). Scallop Tissue RM will be certified for arsenobetaine. At the Meteorological Research Institute, a fallout RM for radioactivity measurements was prepared by using deposition samples collected at 14 stations throughout Japan between prepared by using deposition samples collected at 14 stations throughout Japan between 1963 and 1979. The fallout RM has an averaged composition of the fallour radioactivity in Japan during the period. A recommended value is given for ~137Cs activity, as well as information values for ~90Sr and Pu isotopes. The Japan Society for Analytical Chemistry has recently issued the certified reference material (CRM) consists of a set of two bottles: natural and spiked waters. The 'natural' water is certified for sub-ppb levels of Pb, Cr, As, Cu, Fe, Mn, Zn, B and Al, while the 'spiked' water is intended for use in the regulatory analysis of tap water and fresh water.
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