Simple monitoring of ultrafine particles Henk Goossens June 2011
Ultrafines – a ‘new’ type of hazardous air pollution The EU aims to begin regulation of ultrafine particles in 2013 , said Andre Zuber in a keynote speech on behalf of the European Commission at the EFCA symposium in Brussels on 27 May. 2 Aerasense, June 2011
Ultrafines – a different type of air pollution ultra-fine particles fine particles 0.01 µm 0.1 µm 1 µm 10 µm 10 nm 100 nm 1 000 nm 10 000 nm diameter of a human hair (60 µm) Inhalable particles: < 10 m PM10 < 2.5 m PM2.5 0.01 – 0.30 m ultrafine particles (UFP) 3 Aerasense, June 2011
Toxicology of ultrafines differs from PM10/2.5 Coarse particles are caught in the nose and throat Deposition of airborne particles in deep parts of the lungs (alveoli) as a function of their diameter (source: ICRP, 1994) 100 diesel smoke diesel smoke 80 tobacco smoke tobacco smoke Deposition percentage ultra-fine particles tobacco smoke 60 Ultra-fine particles deposit deep in the lungs 40 20 0 0.001 0.01 0.1 1.0 10 100 Particle diameter (µm) 4 Aerasense, June 2011
Ultrafines need new monitoring equipment • Number/surface instead of mass • Small and simple equipment to check local, traffic related sources 5 Aerasense, June 2011
Aerasense ultrafine monitoring technology • Detects – number concentration – average diameter of ultra fine particles (10 – 300 nm) • Infers surface area concentration • Measures accurately and real- time • Small and easy to use 6 Aerasense, June 2011
Simple application 7 Aerasense, June 2011
Aerasense measures concentration levels accurately 100 ■ SMPS 80 Philips NanoTracer -3 (particles/cm 3 ) 60 40 N*10 20 0 19:45 21:45 23:45 1:45 3:45 5:45 time (hh:mm) 8 Aerasense, June 2011
Aerasense measures particle diameter accurately 100 ■ SMPS Philips NanoTracer 80 60 d p,av (nm) 40 20 0 19:45 21:45 23:45 1:45 3:45 5:45 7:45 9:45 time (hh:mm) 9 Aerasense, June 2011
Aerasense is an established technology for occupational exposure to ultrafines UFP concentration level Main particle size Process or location (particles/cm 3 ) (nm) outdoor, office up to 10.000 silicon melt up to 100.000 280-520 metal grinding up to 130.000 17-170 soldering up to 400.000 36-64 plasma cutting up to 500.000 120-180 bakery up to 640.000 32-109 airport field up to 700.000 < 40 100.000 – 40.000.000 welding 40-600 Average UFP exposure levels measured in a wide variety of work places as measured by the German workers health protection institute BGIA 10 Aerasense, June 2011
Thank you www.aerasense.com henk.goossens@philips.com 11 Aerasense, June 2011
Aerasense technology time Air out I sensor = I 1 I sensor = I 2 Fan I sensor = 0 Sensing section Current meter attached to Faraday V pl = V 1 cage for measuring I sensor V pl V pl = 0 Precipitation section V scr Needle-tip electrode surrounded by a Charging section gauze electrode Inlet section V cor Air in 13 Aerasense, June 2011
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