Chemistry Division, CIEMAT, Madrid, Spain.
Anal Chim Acta. 2012 Apr 29;724:20-9. doi: 10.1016/j.aca.2012.02.050. Epub 2012 Mar 8.
The evaluation of the uncertainty associated to analytical methods is essential in order to demonstrate quality of a result. However, there is often lack of information about uncertainty of methods to estimate persistent organic pollutants concentration in complex matrix. Current work has thoroughly evaluated uncertainty associated to quantification of several organochloride pesticides, PCBs and PAHs in sediments. A discussion of the main contributions to the overall uncertainty is reported, allowing authors to establish the accuracy of results and plan future improvements. Combined uncertainties ranged between 5-9% (pesticides), 4-7% (PCBs) and 5-10% (PAHs), being uncertainty derived of calibration the main contribution. Also, the analytical procedure was validated analysing a standard reference material (IAEA-408).
为了证明结果的质量，评估分析方法相关的不确定性至关重要。然而，在复杂基质中估算持久性有机污染物浓度的方法的不确定性信息往往缺乏。目前的工作彻底评估了几种有机氯农药、多氯联苯和多环芳烃在沉积物中定量的不确定性。报告了对总不确定度的主要贡献的讨论，使作者能够确定结果的准确性并计划未来的改进。组合不确定度范围在 5-9%（农药）、4-7%（多氯联苯）和 5-10%（多环芳烃）之间，校准引起的不确定度是主要贡献。此外，还通过分析标准参考物质（IAEA-408）对分析程序进行了验证。
