Reference regulations:

UNI EN 481:1994

Workplace atmospheres. Granulometric fraction definitions for measuring airborne particles..

UNI EN 689:2019

Workplace exposure – Measurement of exposure to chemical agents by inhalation – Strategy for testing compliance with occupational exposure limit values.

Metodo Unichim 1998:2013

Workplace environment– Inhalable fraction determination of airborne particles via gravimetric method

Metodo Unichim 2010:2011

Workplace environment– Respirable fraction determination of airborne particles via gravimetric method