Which sampling method is typically used to assess airborne allergens?

Active air sampling is recognized as an effective method for assessing airborne allergens because it involves the collection of air samples over a specified period. This technique utilizes a pump that draws air through a collection medium, such as a filter or impactor, which captures particles suspended in the air, including allergens.

The primary advantage of this method is its ability to provide quantitative data on the concentration of airborne allergens in a specific environment, which is crucial for evaluating exposure risk. By continuously sampling during work shifts or throughout the day, occupational hygienists can identify peak exposure times and specific conditions that may elevate allergen levels.

While bioaerosol sampling also relates to airborne particles, it may focus more broadly on biological contaminants and microbes rather than specifically on allergens. Bulk sampling pertains to collecting samples of materials rather than air, which doesn't address airborne allergens effectively. Direct contact sampling measures allergens that come into contact with surfaces and does not capture airborne levels, which is crucial for understanding exposure.