Physico-chemical qualification of a universal portable sampler for aerosols and water-soluble gases

[摘要] Developing a universal portable air sampler based on electrostatic precipitation. The challenge is to collect micro and nanoparticles, microorganisms as well as toxic molecules with a portable device. Electrostatic precipitation is an efficient and gentle method to collect airborne microorganisms and preserve their cultivability. But the collection of toxic gases required is not possible in such a device. The collection of such gases requires a liquid into which they have to be solubilized. Two concepts are being evaluated. The first one is based on electrospray. The goal is to investigate the collection efficiency of water-soluble gases. The second concept is based on the semi-humid electrostatic precipitator. Their high collection efficiencies for particles were already demonstrated. In the present study they are both tested with water-soluble gases. Concentrations are measured in the liquid solution by Ion Chromatography and in the gas phase by Proton Transfer Reaction Mass Spectrometry.

[发布机构] DTBS/CEA-Leti, Minatec Campus, 17 rue des Martyrs, Grenoble; 38054, France^1;LSCE, CEA-Orme des Merisiers, Gif sur Yvette; 91191, France^2

[效力级别] 数学

[关键词] Airborne microorganisms;Collection efficiency;Electrostatic precipitation;High collection efficiency;Micro and nano-particle;Physico-chemicals;Portable device;Proton-transfer reaction mass spectrometries