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Impactor measurement.
Notes: Setup consisting of Alberta throat model, mixing inlet, lung simulator, and NGI. For aqueous aerosol (Respimat) the feed air was humidified (RH >95%) in order to avoid artificial particle shrinking inside the impactor. For dry powders, ambient nonhumidified air was used, which had a relative humidity of 40%–50%.
Abbreviations: ASL, active servo lung; NGI, next generation impactor; RH, relative humidity.
