In this work, we introduce a new particle mass spectrometer (AP-PMS) that is able to detect particle-size distributions at ambient pressure using a three-stage pumping design. This device is demonstrated for direct sampling from the particle formation in spray-flame synthesis of iron oxide nanoparticles. Aerosol sampling is performed by a probe with integrated dilution that has been characterized and configured by computational fluid dynamics simulations and the chamber-skimmer system has been investigated by schlieren imaging. The system was validated by detailed characterization of a standardized sooting flame and by iron oxide nanoparticles generated in the SpraySyn burner from iron nitrate dissolved in a mixture of ethanol and 2-ethylhexanoic acid. The PMS results are compared to additional inline measurements with SMPS and ELPI + as well as with TEM measurements of thermophoretically sampled materials from the same location in the spray flame.

在这项工作中，我们引入了一种新的粒子质谱仪 (AP-PMS)，它能够使用三级泵设计在环境压力下检测粒度分布。该装置被证明用于从氧化铁纳米粒子的喷雾火焰合成中的粒子形成中直接采样。气溶胶采样由带有集成稀释的探头执行，该探头已通过计算流体动力学模拟进行表征和配置，并且已通过纹影成像研究了室式撇渣器系统。该系统通过标准化烟尘火焰的详细表征以及在 SpraySyn 燃烧器中由溶解在乙醇和 2-乙基己酸混合物中的硝酸铁生成的氧化铁纳米颗粒进行验证。