稻谷在加工过程中无机砷含量的分布情况

Distribution of inorganic arsenic content during rice milling processing

中文关键词:  无机砷  糙米  大米  米糠  液相色谱-原子荧光光谱法

英文关键词:inorganic arsine  brown rice  rice  bran powder  liquid chromatography-atomic fluorescence spectrometry

中文摘要:

      目的 测定糙米、大米及糠粉中无机砷的含量, 研究无机砷在稻米中的分布情况。方法 随机抽取20份稻谷样本, 经实验室垄谷和碾米后得到的糙米、大米及糠粉。使用液相色谱-原子荧光联用仪检测所得糙米、大米及糠粉中的无机砷含量。结果 样本中的砷主要以亚砷酸根[As(Ⅲ)]的形式存在。糙米中的亚砷酸根[As(Ⅲ)]含量为(0.122±0.45) mg/kg, 经过碾白后, 其含量显著降低(P<0.05), 为(0.068±0.02) mg/kg, 米糠样本中的亚砷酸根[As(Ⅲ)]含量显著高于其他2个样本(P<0.05), 达到(0.604±0.201) mg/kg。结论 稻米中的无机砷主要以亚砷酸盐[As(III)]形式存在, 糙米经过碾米加工后可以显著降低砷的含量。

英文摘要:

      Objective To determine the content of inorganic arsenic in brown rice, rice and bran powder, and study the distribution of inorganic arsenic in rice. Methods Brown rice, milled rice and bran powder was obtained from 20 random selected samples, which was milled in laboratory. The inorganic arsenic content of brown rice, milled rice and bran powder was determined by liquid chromatography-atomic fluorescence spectrometry. Results The arsenic in the sample was mainly in the form of arsenite [As(Ⅲ)]. The content of arsenite [As(Ⅲ)] in brown rice was (0.122±0.45) mg/kg, after rice milling, its content was significantly reduced (P<0.05), which was (0.068± 0.02) mg/kg. The content of arsenite [As(Ⅲ)] in the bran powder was significantly higher than the other 2 samples (P<0.05), reaching (0.604±0.201) mg/kg. Conclusion Inorganic arsenic in rice is mainly in the form of arsenite [As(III)]. The arsenic content of brown rice can be significantly reduced after rice milling.