ANDERSEN SAMPLER Meaning and
Definition
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The Andersen sampler is a specialized air sampling device primarily used for the collection and enumeration of airborne microorganisms. It consists of a multi-stage, sieve-like apparatus with multiple sampling heads that can be interchanged depending on the desired sampling size range. The design of the Andersen sampler allows for the efficient separation of particles based on their aerodynamic diameter.
The device operates on the principle of inertial impaction, where air with suspended particles is drawn in through an inlet and directed towards the sampler's internal collection plates. As the air passes through the sampler, particles of varying sizes are impacted onto different stages of collection plates, which are coated with a suitable growth medium to support the growth of microorganisms.
Once the sampling is completed, the collection plates can be incubated, allowing the trapped microorganisms to grow and form visible colonies. These colonies can then be counted, identified, and analyzed to determine the presence and concentration of specific microorganisms in the sampled air.
The Andersen sampler is widely used in various fields such as occupational health, environmental monitoring, and pharmaceutical manufacturing, where accurate quantification and characterization of airborne microorganisms are essential. Its versatility, efficiency, and reproducibility make it a valuable tool for air quality assessments, research studies, and regulatory compliance in both indoor and outdoor environments.
Common Misspellings for ANDERSEN SAMPLER
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Etymology of ANDERSEN SAMPLER
The term "Andersen sampler" is named after the Danish microbiologist, Dr. Arthur I. Andersen, who invented it in the mid-1950s. The device, also known as the Andersen microbial impactor or Andersen cascade impactor, is used for the collection and quantification of airborne microorganisms.
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