环境空气 臭氧质量浓度的测定 化学发光法

[中文适用范围]： 指定的方法基于在进入化学发光分析仪之前以恒定的流速连续抽取通过颗粒过滤器的空气样本。 然后流入反应室，与过量的乙烯混合。 臭氧和乙烯瞬间发生反应，产生可见光区域的光（最大波长约为 400 nm）。 发射的光强度与空气样品中的臭氧浓度成正比，并通过光电倍增管测量。 适用于参考条件下2镕/m~10 mg/m之间臭氧质量浓度的测定。 [外文原描述]： The method specified is based on drawing continuously, at a constant flow rate, an air sample through a particle filter before it enters the chemiluminescence analyser. It then flows into a reaction chamber where it is mixed with an excess flow of ethylene. Ozone and ethylene react instantaneously to produce light in the visible region (maximum at about 400 nm). The emitted light intensity is proportional to the concentration of ozone in the air sample and is measured by a photomultiplier tube. Applies to determination of the mass concentration of ozone between 2 µg/m^3 and 10 mg/m^3 at the reference conditions.