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Certified Reference Material for Analytical Quality Assurance of Minor and Trace Elements in Food and Related Matrixes Based on a Typical Japanese Diet: Interlaboratory Study

2001; Oxford University Press; Volume: 84; Issue: 4 Linguagem: Inglês

10.1093/jaoac/84.4.1202

1944-7922

Jun Yoshinaga, Masatoshi Morita, Masae Yukawa, Kunio Shiraishi, Hisao Kawamura, Hideki Arae, Samuel I. Baker, R. M. Barnes, H.S. Dang, P. De Regge, Yosuke Funato, K Futatsugawa, Shoji HIRAI, Takashi Kato, Katsuya Kawamoto, M Matsubara, H. Matsue, Nancy J. Miller‐Ihli, Y. Muramatsu, Tomohiro Narukawa, Yukiko Okada, Eva Reitznerová, Hiroshi Sakamoto, K. Sera, Kisa Shindo, Satoru Suzuki, Jun Takata, Tomonari Takeuchi, Yuzo Tamari, Yoshiyuki TANIZAKI, Claude Veillon, A Yasui, Chushiro Yonezawa,

Analytical chemistry methods development

A Certified Reference Material (CRM) was prepared at the National Institute for Environmental Studies (NIES), Japan, in collaboration with the National Institute of Radiological Sciences (NIRS), Japan, for the analytical quality assurance of minor and trace elements in food and related matrixes. The starting material for the CRM was all food served in 29 households in Japan over two 3-day periods in 1997-1998, and thus the CRM represented a typical Japanese diet. All foods (meals, snacks, and beverages) were homogenized, freeze-dried, pulverized, blended, dispensed into 1,100 bottles, and sterilized. The within- and between-bottle homogeneity of the prepared CRM was satisfactory for most of the elements. The concentrations of 14 elements (Na, Mg, K, Ca, Mn, Cu, Zn, As, Se, Sr, Cd, Sn, Ba, and U) were certified based on a collaborative analysis involving NIES, NIRS, and 20 other laboratories. Reference values were given for the concentrations of 12 additional elements (P, Cl, Fe, Co, Ni, Br, Rb, Mo, I, Cs, Pb, and Th). The elements certified and those given reference values include minerals, essential trace elements, contaminant elements, and long-lived radionuclides. Thus, this CRM is of practical value in the quality assurance of element analysis of foods and diets in nutritional, environmental, and radiological research.