Device and method for determining an aerosol delivery

A method for determining an aerosol delivery of an aerosol stream, the method comprising the following steps:

• a) providing an aerosol stream generated by an aerosol generator;
• b) guiding aerosol particles carried by the aerosol stream through at least one measurement volume and providing an interaction of the aerosol particles with at least one light beam within the measurement volume;
• c) generating at least one optical measurement signal depending on the interaction of the at least one light beam with the aerosol particles passing the measurement volume;
• and
• d) determining the aerosol delivery of the aerosol stream from the at least one optical measurement signal, wherein a conversion function between the optical measurement signal and the aerosol delivery is used,
• wherein the conversion function is determined by performing the following step e) at least one single time:
• e) collecting the aerosol particles carried by the aerosol stream in a filter, measuring a particle load on the filer;
• and determining the conversion function from a relationship between the particle load and the at least one optical measurement signal, and wherein the method comprising steps a) to e) and the following step f):
• f) generating at least two optical measurement signals for at least two different particle loads of the aerosol particles, measuring the at least two different particle loads of the aerosol particles on at least two different filters, and determining at least one of the absorption or the adsorption of the liquid on the aerosol particles from an assumed zero optical measurement signal.