Department of Chemical Engineering, School of Chemistry, University of Murcia, 30071, Murcia, Spain.
Environ Sci Pollut Res Int. 2011 Mar;18(3):436-45. doi: 10.1007/s11356-010-0386-z. Epub 2010 Sep 4.
The change in light intensity that takes place when an ambient air sample is drawn into the detection chamber of a chemiluminescence monitor generates changes in the concentrations of several species, such as NO(2), NO and O(3). Although this phenomenon has been known for several decades, there is still no commonly accepted approach on when or how to correct for it in NO(2) and O(3) readings.
In this work, we have assessed the expanded uncertainty of two chemiluminescence NO( x ) analysers commercially available according to EN 14211:2005, with the aim of establishing the maximum allowable standard uncertainty due to the reaction between NO and O(3) in the sampling system.
Although this maximum allowable uncertainty cannot be a universal value-as it will depend on the performance of each analyser-our results have led us to propose the conservative value of 2%. We have also proposed a methodology for improving data quality which could be easily implemented by those responsible for air quality data validation.
当环境空气样本被吸入化学发光监测器的检测室时，光强度的变化会导致几种物质（如 NO(2)、NO 和 O(3)）浓度发生变化。尽管这种现象已经存在了几十年，但对于何时以及如何在 NO(2)和 O(3)读数中进行校正，仍然没有普遍接受的方法。
在这项工作中，我们评估了根据 EN 14211:2005 商业化的两种化学发光 NO(x)分析仪的扩展不确定度，目的是确定由于采样系统中 NO 和 O(3)之间的反应引起的最大允许标准不确定度。
尽管这个最大允许不确定性不能作为一个通用值（因为它将取决于每个分析仪的性能），但我们的结果促使我们提出 2%的保守值。我们还提出了一种提高数据质量的方法，空气质量数据验证的负责人可以很容易地实施该方法。
