摘要
采用浙江省收获的自然污染镉的稻谷样品为材料,通过实验室砻谷和碾米得到糙米、加工精度为三级的大米、糠粉等组成成分,并利用微波消解,石墨炉原子吸收光谱法测定镉的含量并进行比较,分析糙米在碾白加工前后镉含量变化和分布情况。结果表明:糙米加工成大米的精米率平均为90.46%,而糠粉所占的比例平均为9.22%,大米和糠粉中镉的含量与糙米中镉的含量有显著的相关性,糙米碾白后制得的大米,镉含量有显著降低,平均为糙米中含量的94.81%;糠粉中镉含量则显著升高,平均是糙米的144.84%。留存在大米中的镉的总量占糙米的85.75%,留存在糠粉中镉的总量占糙米的13.36%。通过碾白将糙米制成大米,能降低可食用部分的镉含量,但总量降低幅度不大。
In this study,brown rice,milled rice and bran powder were obtained from paddy produced in Zhejiang Province,with natural contamination of cadmium(Cd),through rice husk and rice milling in the lab.Cd in paddy was extracted by microwave digestion instrument and determined by graphite furnace atomic absorption spectrometry(GFAAS).Then,the content and distribution of cadmium in brown rice,milled rice and bran powder were analyzed,through rice milling processing.The results showed that the average rice rate was 90.46%,and the proportion of bran powder was 9.22%.The content of cadmium in milled rice and bran powder was significantly correlated with the content of cadmium in brown rice.The cadmium content in milled rice decreased significantly,compared with brown rice,with an average content was 94.81%of the brown rice,and the content of cadmium in bran powder increased significantly,with an average of 144.84%of the brown rice.The total amount of cadmium remaining in milled rice accounts for 85.75%of brown rice,with the total amount of cadmium remaining in bran powder accounts for 13.36%.Through rice milling processing,Cd in edible parts can be reduced,but the total amount can not be significantly reduced.
作者
赵美凤
房芳
宁晖
邵亮亮
杜京霖
张谷平
Zhao Meifeng;Fang Fang;Ning Hui;Shao Liangliang;Du Jinglin;Zhang Guping(Grain and Oil Products Quality Inspection Center of Zhejiang Province,Hangzhou 310012)
出处
《粮食与食品工业》
2018年第6期66-72,共7页
Cereal & Food Industry
关键词
稻谷
镉
碾米
石墨炉原子吸收光谱法
paddy
Cadmium
rice milling
graphite furnace atomic absorption spectrometry
