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进行了小麦粉营养成分分析标准物质的研制。选用上海农业科学院作物研究所培育的“杨麦一号”小麦种子经脱壳、粉碎、过筛，用60Co γ射线照射使其贮存稳定期达7年以上；用数理统计F检验法和t检验法检验证明其均匀性良好；由9个单位共同协作定值，共定值137组， 548个数据，经统计检验，小麦粉中粗蛋白质、粗淀粉、粗脂肪、氨基酸总量、天门冬氨酸、苏氨酸、丝氨酸、谷氨酸、脯氨酸、甘氨酸、丙氨酸、缬氨酸、蛋氨酸、异亮氨酸、亮氨酸、酪氨酸、苯丙氨酸、赖氨酸、组氨酸、精氨酸共20个营养成分定为标准值。所研制的标准物质其稳定性、均匀性及营养成分定值的不确定度均符合国家级标准物质技术指标，已被批准为国家级标准物质。“,”A certified reference material of wheat powder for the analysis of twenty nutritional ingredients was prepared by means of peeling， crushing and sifting the wheat seed ″ Yang Mai No 1″, cultivated by Crop Institute of Shanghai Academy of Agricultural Science. The stabile period of the certified reference material is more than seven years after it was irradiated by 60Co γ _ ray. Its homogeneity is good according to F _ test and t _ test. The twenty nutritional ingredients include crude protein, crude starch, crude fat, total amino acid, and individual amino acid: aspartic acid, threonine, serine, glutamic acid, proline, glycine, alanine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, lysine, histidine and arginine. Its stability, homogeneity and uncertainty of definite values for the nutritional ingredients fit the technological requirements of certified reference material. Its qualification of GBW has been approved.