La massa m di particolato emessa dal veicolo durante la prova si determina pesando la massa di particolato emessa dai due filtri m1 (primo filtro) e m2 (secondo filtro): ###>The mass m of particulate pollutant emissions from the vehicle during the test shall be defined by weighing the mass of particulates collected by the two filters, m1 by the first filter, m2 by the second filter: