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

Electrostatics 2015

物理学;数学

Roux, Jean-Maxime^1 ; Sarda-Estève, Roland^2

DTBS/CEA-Leti, Minatec Campus, 17 rue des Martyrs, Grenoble

38054, France^1

LSCE, CEA-Orme des Merisiers, Gif sur Yvette

91191, France^2

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/646/1/012012/pdf
DOI  :  10.1088/1742-6596/646/1/012012

来源: IOP

【 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.