Joshinaga J, Morita M, Yukawa M, Shiraishi K, Kawamura H
National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan.
J AOAC Int. 2001 Jul-Aug;84(4):1202-8.
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.
日本国立环境研究所（NIES）与日本国立放射科学研究所（NIRS）合作，制备了一种有证标准物质（CRM），用于食品及相关基质中微量元素和痕量元素分析的质量保证。该CRM的起始原料是1997 - 1998年期间日本29个家庭在两个为期3天的时间段内提供的所有食物，因此该CRM代表了典型的日本饮食。所有食物（餐食、零食和饮料）均进行了均质化、冷冻干燥、粉碎、混合，分装到1100个瓶子中，并进行了灭菌处理。所制备的CRM在瓶内和瓶间的均匀性对于大多数元素而言是令人满意的。基于NIES、NIRS和其他20个实验室参与的协作分析，对14种元素（钠、镁、钾、钙、锰、铜、锌、砷、硒、锶、镉、锡、钡和铀）的浓度进行了定值。还给出了另外12种元素（磷、氯、铁、钴、镍、溴、铷、钼、碘、铯、铅和钍）浓度的参考值。经定值的元素和给出参考值的元素包括矿物质、必需微量元素、污染元素和长寿命放射性核素。因此，这种CRM在营养、环境和放射学研究中食品和饮食元素分析的质量保证方面具有实际价值。
