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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (21): 77-81.

• 食品 营养 检测 安全 • 上一篇    下一篇

原子荧光法测定总砷含量不确定度评定

冯晓元 李文生 王宝刚 张长松 石磊 杨军军 潘立刚   

  • 收稿日期:2009-06-10 修回日期:2009-06-29 出版日期:2009-11-05 发布日期:2009-11-05

Evaluation of measurement uncertainty on arsenic detection by atomic fluorescence spectrometer

  • Received:2009-06-10 Revised:2009-06-29 Online:2009-11-05 Published:2009-11-05

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摘要：

以圆白菜标准物质为材料，评估原子荧光法测定总砷含量的不确定度。根据不确定度分量大小可以得出，砷测定值的不确定度主要来源于测定过程中校准曲线的不确定度。该方法测定总砷含量的扩展不确定度为0.0098 mg/kg，检测结果为(0.066±0.010) mg/kg，在标准物质含量(0.062±0.014) mg/kg的范围内，表明方法的分析过程处于质控状态，结果可靠。

关键词: 温室蝴蝶兰, 温室蝴蝶兰, 生长模型, 温室控制

Abstract:

The total arsenic content of cabbage as a certified reference material (CRM) was analyzed in order to evaluate the measurement uncertainty of Atomic Fluorescence Spectrometer (AFS) method. The result showed that the uncertainty in measurement was contributed to that of the standard curve is main uncertainty component. The expanded uncertainty of AFS measurement was 0.0098 mg/kg. The detected total As contend in the cabbage sample was (0.066±0.010) mg/kg，which was consistent with CRM value (0.062±0.014) mg/kg. Results suggested that analysing procedure of As content was under control and reliable.