Active Air Sampling Limits

1 impingers impingers use a liquid medium for particle collection.

Active air sampling limits.

Active air sampling sites should be done at the same locations or as close as practical to avoid compro mising the other measure or the product integrity. Active sampling involves the use of an air sampling pump to actively pull air through a collection device such as a filter. Airborne gases and vapours are collected by a physical process such as diffusion through a static air layer or permeation through a membrane. Active air sampling requires the use of a microbiology air sampler to physically draw a known volume of air over or through a particle collection device and there are two main types.

Active monitoring utilizes microbiological air sampling devices that physically draw a known volume of air over or through a microbial particle collection medium either by impaction impingement. Active and passive monitoring. Passive sampling however does not require active air movement from a pump. This leaves determination of the number ofsites for passive air sampling and surface sampling.

In active monitoring a microbial air sampler is used to force air into or onto its collection medium e g petri dish with nutrient agar based test media over a specified period of time. The collected culture can then be incubated and.