| 微波消解-HG-AFS测定大米中痕量砷 |
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| 引用本文： | 牟仁祥,陈铭学,应兴华,施勇烽,朱智伟.微波消解-HG-AFS测定大米中痕量砷[J].光谱实验室,2003,20(6):852-855. |
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| 作者姓名： | 牟仁祥 陈铭学 应兴华 施勇烽 朱智伟 |
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| 作者单位： | 农业部稻米及制品质量监督检验测试中心,中国水稻研究所,杭州市体育场路359号,310006 |
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| 基金项目： | 农业部行业标准项目资助 (编号 :0 4 0 35 ) |
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| 摘 要： | 研究了微波消解-氢化物发生-原子荧光光谱法测定大米中痕量砷的方法。建立了大米用微波消解的最佳分析条件，试验了酸、预还原剂用量等对测定砷的影响，并讨论了大米中其他伴生元素对测定的干扰情况，确定了原子荧光光谱仪的参数设置和最佳氢化反应条件。检出限为0．04ng／mL。此法测定标准物质大米粉(GBW 08502)中砷的含量，其结果与证书值相吻合，相对标准偏差为2．5％，回收率为93．9％-115．0％。
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| 关 键 词： | 微波消解 氢化物发生 原子荧光光谱法 大米 砷 HG AFS 光谱仪 参数设置 |
| 文章编号： | 1004-8138(2003)06-0852-04 |
Determination of Trace Arsenic in Rice by Microwave Digestion-HG-AFS |
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| MOU Ren-Xiang,CHEN Ming-Xue,YING Xing-Hua,SHI Yong-Feng,ZHU Zhi-Wei.Determination of Trace Arsenic in Rice by Microwave Digestion-HG-AFS[J].Chinese Journal of Spectroscopy Laboratory,2003,20(6):852-855. |
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| Authors: | MOU Ren-Xiang CHEN Ming-Xue YING Xing-Hua SHI Yong-Feng ZHU Zhi-Wei |
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| Abstract: | Trace arsenic in rice was determined by microwave digestion-HG-AFS.The experimental conditions of microwave digestion of samples and of hydride generation atomic fluorescence spectrometry for determination were optimized.The effect of the medium acid and amount of reducing agent on determination of arsenic and the interference from element formed hydride compound and coexistent elements in rice were discussed.The detection limit was 0.04ng/mL.The method was used to determine arsenic in reference materials(rice flour,GBW 08502),which shows a good agreement with standard value.The RSD was 2.5%,and the recovery of lead was 93.9%-115.0%. |
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| Keywords: | Microwave Digestion Hydride Generation Atomic Fluorescence Spectrometry Rice Arsenic |
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