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首页> 外文期刊>Atmospheric Measurement Techniques >Facility for production of ambient-like model aerosols (PALMA) in the laboratory: application in the intercomparison of automated PM monitors with the reference gravimetric method
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Facility for production of ambient-like model aerosols (PALMA) in the laboratory: application in the intercomparison of automated PM monitors with the reference gravimetric method

机译：在实验室中生产环境型号的设施：在实验室中的环境：在自动PM监测器中的互相应用中的应用参考重量法

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A new facility has been developed which allows for a stable and reproducible production of ambient-like model aerosols (PALMA) in the laboratory. The set-up consists of multiple aerosol generators, a custom-made flow tube homogeniser, isokinetic sampling probes, and a system to control aerosol temperature and humidity. Model aerosols containing elemental carbon, secondary organic matter from the ozonolysis of α -pinene, inorganic salts such as ammonium sulfate and ammonium nitrate, mineral dust particles, and water were generated under different environmental conditions and at different number and mass concentrations. The aerosol physical and chemical properties were characterised with an array of experimental methods, including scanning mobility particle sizing, ion chromatography, total reflection X-ray fluorescence spectroscopy and thermo-optical analysis. The facility is very versatile and can find applications in the calibration and performance characterisation of aerosol instruments monitoring ambient air. In this study, we performed, as proof of concept, an intercomparison of three different commercial PM (particulate matter) monitors (TEOM 1405, DustTrak DRX 8533 and Fidas Frog) with the gravimetric reference method under three simulated environmental scenarios. The results are presented and compared to previous field studies. We believe that the laboratory-based method for simulating ambient aerosols presented here could provide in the future a useful alternative to time-consuming and expensive field campaigns, which are often required for instrument certification and calibration.
机译：已经开发了一种新的设施，其允许在实验室中稳定和可重复生产的环境模型气溶胶（Palma）。设置由多种气溶胶发生器，定制的流动管均化器，等动血管采样探针以及控制气溶胶温度和湿度的系统组成。模型含有元素碳的气溶胶，来自α-丁烯臭氧的臭氧的二次有机物质，在不同的环境条件下和不同的数量和质量浓度下产生无机盐，硝酸铵，矿物粉尘颗粒和水。通过一种实验方法表征气溶胶物理和化学性质，包括扫描迁移率粒度，离子色谱，全反射X射线荧光光谱和热光学分析。该设施非常通用，可以在气溶胶仪器监测环境空气的校准和性能表征中找到应用。在这项研究中，我们作为概念证明，三种不同商业PM（颗粒物质）监视器（TEOM 1405，DUSTTRAK DRX 8533和FIDAS FROG）的概念的相互熟练素，其三种模拟环境情景下的重量参考方法。结果表明并与之前的实地研究相比。我们认为，基于实验室的模拟此处的环境气溶胶的方法可以在未来提供耗时和昂贵的现场运动的有用替代品，通常需要仪器认证和校准。

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