Active Air Sampling Vs Passive Air Sampling

Active and passive monitoring.

Active air sampling vs passive air sampling.

Passive air sampling also referred to as diffusive air sampling passive air sampling basically involves leaving settle plates or contact plates exposed to the air for a certain period of time to collect microbes that may settle onto the surfaces of the plates. Passive sampling however does not require active air. Active sampling involves the use of an air sampling pump to actively pull air through a collection device such as a filter. This article discusses the utility of active air versus passive air settle plate monitoring in a routine environmental monitoring program with an emphasis on the monitoring of the critical grade a environments.

Active sampling unlike passive sampling where a number of agar plates are placed throughout the facility at the same time and then all left to sit for 1 hour active sampling requires an air sampling instrument. Active versus passive air sampling iet september october 2005 author details health safety by eddie salter skc ltd tel. Passive sampling relies on the kinetic energy of gas molecules and diffusion of the gases in an enclosed space onto a sorbent medium. It is recognized that there has been a long standing historical use of settle plates in t.

This article discusses the utility of active air versus passive air settle plate monitoring in a routine environmental monitoring program with an emphasis on the monitoring of the critical grade a environments. Active sampling requires the use of a pumping device to actively pass air through an air sample container whereas passive sampling does not. 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. It is recognized that there has been a long standing historical use of settle plates in the pharmaceutical industry and that european regulatory agencies have supported their use.

Airborne gases and vapours are collected by a physical process such as diffusion through a static air layer or permeation through a membrane. Accurate measurement of air pollutants in outdoor indoor and or personal air is critical for assessing exposure to air pollution and potential health effects. Passive sampling however does not require active air movement from a pump. 44 0 1258 480188 email.

Portable samplers such as the sas super 180 allow users to quickly sample at multiple locations within a clean room.