Performance study of portable devices for the real-time measurement of airborne particle number concentration and size (distribution)

Sébastien Bau (1) , Raphaël Payet (1) , Olivier Witschger (1) , Elżbieta Jankowska (2)

1 Laboratoire de Métrologie des Aérosols
2 Department of Chemical, Aerosol and BIological Hazards

The aim of this experimental study was to investigate the performance of both portable and transportable devices devoted to the real-time measurement of airborne particle number concentration and size (distribution). Electrical mobility spectrometers (SMPS, FMPS, Nanoscan) as well as diffusion chargers (DiSCmini, Nanotracer) were studied. Both monodisperse and polydisperse aerosols were produced within the CAIMAN facility to challenge the instruments. The monodisperse test aerosols were selected in the 15-400 nm diameter range using a differential mobility analyser (DMA), and presented number concentrations of between 6.10 2 and 2.10 5 cm-3. The polydisperse test aerosols presented modal diameters of between 8 and 270 nm and number concentrations between 4.10 3 to 10 6 cm-3. The behavior of the different devices is expressed as (1) the ratio of the reported diameter to the reference diameter, and (2) the ratio of the reported number concentration to the reference concentration. These results are displayed as boxplots to better represent the statistical distribution of the experimental results. For the group of electrical mobility spectrometers, a good agreement between SMPS and FMPS and the reference was demonstrated. A slight tendency for the Nanoscan to underestimate particle size distribution for particles above around 100 nm was observed. The data reported for the group of diffusion chargers demonstrate that all, except the Nanotracer, show a tendency to underestimate particle diameter, by a factor around-40% to-10%. In the case of particle concentration, larger deviations were observed.

Ce poster présente une étude sur les performances des appareils portables dédiés à la mesure en temps réel de la concentration en nombre de particules et la (distribution en) taille de particules dispersées dans l’air. Des aérosols monodispersés et polydispersés, consistant en des métaux (carbone, titane, constantan, argent), des sels (chlorure de sodium, chlorure de césium) et composés organiques (DEHS) ont été produits pour étudier les performances des instruments. Jusqu'à présent, les instruments suivants ont été étudiés : NanoScan (TSI, 3 spécimens), DiSCmini (TESTO, 6 spécimens), nanotracer (Philips Aerasense, 1 spécimen). Le comportement des différents dispositifs sera discuté dans la présentation.

Mots clés: ECHANTILLONNEUR INDIVIDUEL; ESSAI COMPARATIF; NANOMATERIAU; 7440-02-0; 7440-22-4; 7440-32-6; 7440-44-0; 7440-50-8; 7647-14-5; AIR; ANALYSE CHIMIQUE; APPAREIL; ARGENT; CARBONE; CONGRES; CUIVRE; ECHANTILLONNEUR; EXPOSITION PROFESSIONNELLE; EXTRAIT; MACHINE PORTATIVE; MESURE; METAL LOURD; NICKEL; PRELEVEMENT; PRODUIT CHIMIQUE; SODIUM CHLORURE; TITANE

Domaines: Micro et nanotechnologies/Microélectronique; Génie chimique; Instrumentations et Détecteurs [physics.ins-det]; Toxicologie

Sébastien Bau, Raphaël Payet, Olivier Witschger, Elżbieta Jankowska. Performance study of portable devices for the real-time measurement of airborne particle number concentration and size (distribution). Journal of Physics: Conference Series, 2017, 838, pp.012001. ⟨10.1088/1742-6596/838/1/012001⟩. ⟨hal-01639804⟩