Ejemplos de mediciones de particulas Kate Blumberg Reduccion claro en vehículos con filtro Advanced Collaborative Emissions Study (ACES), HEI 2013. El filtro: La única tecnología exitosa para reducir número de partículas de diesel “The usage of a wall-flow diesel particulate filter leads to an extreme reduction of the emitted particulate mass and number, approaching 100%.” Fiebig, M., Wiartalla, A., Holderbaum, B. Y Kiesow S., 2014. Particulate emissions from diesel engines: correlation between engine technology and emissions. Journal of Occupational Medicine and Toxicology. Tartakovsky, L., at al., 2015. Ultrafine particle emissions by inuse diesel buses of various generations at low-load regimes. Atmospheric Environment 107: 273-280. P-Trak 0 to 5x105 particles per cm3 0.02 to 1 micrometer Condensation measurement counter, good correlation with more robust devices About a 25% lower measurement bias for ambient and exhaust emissions P-Trak Field Comparison of P-Trak and Condensation Particle Counters, Yifang Zhu, Nu Yu, Thomas Kuhn, and William C. Hinds, Aerosol Science & Technology, 40:422-430, 2006 Ciudad de México: P-Trak Source: Dr. Kaare Press-Kristensen, 2015 Un bus diesel sin filtro: 236,000 particles per cm3 San Francisco, CA, September 23, 2016 Con filtro: 100s hasta 1000s: 3-4 ordenes de magnitude abajo Source: Dr. Kaare Press-Kristensen, 2015