Cascade Impactor (APSD) testing
Cascade Impactor testing
Cascade Impactor testing or Aerodynamic particle size distribution (APSD) testing is the most used method to assess the quality of an device that is intended to according to recognized global compendia, such as US Pharmacopeia section <601> and European Pharmacopoeia sections 2.9.18 and 2.9.44. At Emmace, the next generation impactor (NGI) is the most used impactor but we also use Andersen Cascade impactor and the Multi stage liquid impinger (MLSI).
See also related subject Delivered dose / emitted dose testing