| 电感耦合等离子体质谱法测定小麦粉中铅及其不确定度评定 |
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| 引用本文： | 张宏峰,周洪伟,彭荣飞,潘心红,许萍.电感耦合等离子体质谱法测定小麦粉中铅及其不确定度评定[J].广东化工,2014(17):172-174. |
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| 作者姓名： | 张宏峰 周洪伟 彭荣飞 潘心红 许萍 |
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| 作者单位： | 广州市疾病预防控制中心理化科,广东广州510440 |
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| 摘 要： | 通过建立数学模型,对电感耦合等离子体质谱法测定小麦粉中的铅的进行不确定度评定。分析并计算了各不确定度分量,计算合成标准不确定度和扩展不确定度。结果表明,方法测量不确定度主要由曲线校正和样品测试重复性引入,而定容体积和称样过程的不确定度可忽略不计。
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| 关 键 词： | 不确定度 铅 小麦粉 电感耦合等离子体质谱法 |
Uncertainty Evaluation for the Determination of Lead in Wheat Flour by ICP-MS |
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| Zhang Hongfeng,Zhou Hongwei,Peng rongfei,Pan Xinhong,Xu Ping.Uncertainty Evaluation for the Determination of Lead in Wheat Flour by ICP-MS[J].Guangdong Chemical Industry,2014(17):172-174. |
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| Authors: | Zhang Hongfeng Zhou Hongwei Peng rongfei Pan Xinhong Xu Ping |
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| Affiliation: | (Physical and Chemical Laboratory, Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China) |
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| Abstract: | In order to evaluate the uncertainty in measuring the lead in wheat flour by Inductively Coupled Plasma-Mass Spectroscopy （1CP-MS）, a mathematic model was established to analyze the uncertainty sources from different parts. The final uncertainty degree was calculated by standard uncertainty and extended uncertainty during measurements. As a result, the major uncertainty was attributed to calibration of standard solution and repeatability of sample preparation. The uncertainty from sample weight and constant volume could be ignored. |
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| Keywords: | uncertainty： lead： wheat flour ICP-MS |
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