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NIOSH 2009: Nanoparticle emission assessment technique

NIOSH_200This research paper, published by researchers from the US National Institute for Occupational Safety and Health (NIOSH) in the Journal of Occupational and Environmental Hygiene, describes a novel nanoparticle emission assessment technique (NEAT) which uses a combination of measurement techniques and instruments to assess potential inhalation exposures in facilities that handle or produce engineered nanomaterials.

The NEAT utilises portable direct-reading instrumentation supplemented by a pair of filter-based air samples (source-specific and personal breathing zone). The use of the filter-based samples are considered to be crucial for identification purposes because particle counters are generally insensitive to particle source or composition and make it difficult to differentiate between incidental and process-related nanomaterials using number concentration alone.

A companion article (Part B) is available which compiles results using the NEAT approach at 12 workplace facilities.

Did you know?

4 µm is the median aerodynamic diameter of particles that fall within the respirable size range.