电感耦合等离子体质谱法和液相色谱-原子荧光联用法分析广西籼稻谷中砷含量的分布

Distribution analysis of arsenic content in indica rice in Guangxi by inductively coupled plasma-mass spectrometry and liquid chromatography-atomic fluorescence spectrometry

中文关键词:  稻谷  总砷  无机砷  含量  分布分析

英文关键词:paddy  total arsenic  inorganic arsenic  content  distribution analysis

中文摘要:

      目的 研究广西籼稻谷中砷含量的分布。方法 选取广西区内100份籼稻谷作为实验材料, 将籼稻谷脱壳分别制成糙米和精度一级的大米, 采用电感耦合等离子体质谱法(inductively coupled plasma-mass spectrometry, ICP-MS)和液相色谱-原子荧光联用法(liquid chromatography-atomic fluorescence spectrometry, LC-AFS)分别检测总砷和无机砷含量。结果 方法的标准曲线线性良好, 总砷的检出限为0.0030 ng/mL, 无机砷的检出限为0.0139 ng/mL; 糙米总砷含量约是精米总砷含量的1.8倍, 糙米无机砷含量约是精米无机砷含量的1.9倍; 糙米中总砷含量约是糙米无机砷含量的1.7倍, 糙米中无机砷含量远远低于总砷含量。结论 砷元素在稻谷中的分布主要富集在皮层中, 总砷和无机砷在糙米和精米中的分布不同。

英文摘要:

      Objective To study the distribution of arsenic content in indica rice in Guangxi. Methods One hundred indica rice samples in Guangxi were selected as experimental materials. The indica rice was shelled into brown rice and rice with first-class accuracy. The total arsenic and inorganic arsenic content was detected by inductively coupled plasma-mass spectrometry (ICP-MS) and liquid chromatography-atomic fluorescence spectrometry (LC-AFS). Results The standard curve of the method had good linear. The limit of detection total arsenic was 0.0030 ng/mL, and the limit of detection inorganic arsenic was 0.0139 ng/mL. The total arsenic content of brown rice was about 1.8 times that of white rice, and the inorganic arsenic content of brown rice was about 1.9 times that of white rice. The content of total arsenic in the brown rice is about 1.7 times that of inorganic arsenic in the brown rice, and the content of inorganic arsenic in the brown rice is far lower than that of total arsenic. Conclusion The arsenic in rice is mainly enriched in the cortex. The distribution of total arsenic and inorganic arsenic is different in the brown rice and white rice.