Top-down线性拟合法评定电感耦合等离子体质谱法测定饮用水中砷含量的不确定度

Uncertainty evaluation for determination of arsenic in drinking water by inductively coupled plasma mass spectrometry based on Top-down linear fitting method

中文关键词:  砷含量  饮用水  Top-down技术性拟合法  不确定度

英文关键词:arsenic content  drinking water  Top-down linear fitting method  uncertainty

中文摘要:

      目的 使用Top-down技术线性拟合法评定电感耦合等离子体质谱法测定生活饮用水中砷含量的不确定度。方法 按照GB /T 5750.6-2006《生活饮用水标准检验方法 金属指标》规定的分析方法, 在期间精密度条件下, 对不同浓度水平的砷含量进行测定, 基于Top-down线性拟合法的原理对积累的数据进行检验和分析。结果 在证明建立的经验模型正确后, 计算得到不确定的结果U=0.28 μg/L。结论 Top-down技术用于化学分析不确定度评估将不确定度评估与实验室内部质量控制工作有机地结合起来, 减少了工作量, 具有广泛的应用前景。

英文摘要:

      Objective To evaluate the uncertainty for the determination of arsenic content in drinking water by inductively coupled plasma mass spectrometry (ICP-MS) based on the Top-down linear fitting method. Methods According to GB /T 5750.6-2006 Standard examination method for drinking water-Metal parameters, the different content of arsenic was determined under the condition of precision during the period. Based on the principle of Top-down linear fitting method, the accumulated data was tested and analyzed. Results After confirming the established empirical model was correct, the result of uncertainty was U=0.28 μg/L. Conclusion Top-down linear fitting method is used in the uncertainty evaluation of chemical analysis, which combines the uncertainty evaluation with the laboratory internal quality control work, reduces the workload, and has a wide range of application prospects.