中文摘要：

对稻米碾磨加工过程中各米样和各道米糠主要营养成分和5种矿质元素Cu、Zn、Ca、Mg、Fe进行了测定分析,结果表明：糙米含有比精米更加丰富的营养成分和矿质元素;一道米糠含有丰富的油脂和蛋白,其质量分数分别为21.88%、15.57%,二道米糠中油脂和蛋白的质量分数较大,分别为13.26%、13.41%,三道米糠中淀粉质量分数高达51.39%;稻米中矿质元素较多地存在于米糠中,各道米糠中5种矿质元素的总量依次为13 006.81、9 901.53、6 767.78μg/g,明显高于各米样,稻米中5种矿质元素含量的高低顺序是：Mg〉Ca〉Zn〉Fe〉Cu。

英文摘要：

The main nutritional ingredients and five kinds of mineral elements（Cu,Zn,Ca,Mg,Fe） of the rice samples and rice brans in each stage of rice whitener were determined and analyzed.The results show that brown rice had more nutritional ingredients and mineral elements than polished rice;the rice bran in first stage was abundant in oil and protein,their mass fraction were 21.88%,15.57% respectively;the mass fraction of oil and protein of the rice bran in second stage was also higher and they were 13.26%,13.41% respectively;the starch of the rice bran in third stage reached up to 51.39%.More mineral elements presented in the rice bran.The total amount of 5 mineral elements in rice bran were 13 006.81,9 901.53,6 767.78 μg/g in turn,these were obviously higher than those in the rice samples.The order of mineral elements content in rice was MgCaZnFeCu.