APSD for Dry Powder Inhalers (DPIs)

The Aerodynamic Particle Size Distribution of a DPI will determine where the particles in the aerosol cloud are likely to deposit following inhalation. If the particles are too large they will catch at the back of the throat. Too small, and they will be exhaled rather than deposited.
The instrument of choice for measuring the APSD of DPI products to meet both regulatory and pharmacopoeial requirements alike is the cascade impactor.
There are five different cascade impactors/impingers suitable for the assessment of APSD, however, only the Andersen Cascade Impactor (ACI), the Next Generation Impactor (NGI) and the Multi-Stage Liquid Impinger (MSLI) appear in both the US and European Pharmacopoeias.

Labour Saving Tools

Improve efficiency
Reduce variability
Eliminate handling errors
Increase testing capacity

How Does a Cascade Impactor Work?

Play Video

Related Services

Training

We offer a range of training courses, presentations and seminars covering a wide range of topics....

Find Out More

Servicing

A comprehensive range of both in-house and on-site product servicing options are available...

Find Out More

Support

Our team of experienced technicians and engineers are on hand to help and advise ...

Find Out More