1.1 This practice describes specified apparatus and procedures for collection of non-fibrous airborne metal nanoparticles generated during work activities. 1.2 NRD samplers are designed to follow a nanoparticulate matter (NPM) deposition curve based on the ICRP model for deposition of particles smaller than 300 nm (the minimum deposition for submicrometer particles) while removing the larger particles (1). 1.3 This practice is applicable to personal and area sampling during work processes and situations where metal nanoparticles may be generated (for example, welding, smelting, shooting ranges). 1.4 This practice is intended for use by professionals experienced in the use of devices for occupational air sampling (such as cyclone samplers). 1.5 This practice is not applicable to the sampling of fibrous nanoparticles such as carbon nanotubes. 1.6 Detailed operating instructions are not provided owing to differences among various makes and models of suitable devices and instruments. The user is expected to follow specific instructions provided by the manufacturers of particular items of equipment. This practice does not address comparative accuracy of different devices nor the precision between instruments of the same make and model. 1.7 This practice contains notes that are explanatory and are not part of the mandatory requirements of the method. 1.8 The values stated in SI units are to be regarded as the standard. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywordsaerosols; nanoparticles; metals; respiratory deposition; workplace air
Exposure to high concentrations of aerosolized fine and ultrafine metal particles, including Mn, Cr, and Ni generated during processes that use high energy such as welding or smelting may elicit adverse health effects. Animal and epidemiological studies have associated welding and some welding processes with a wide range of adverse health effects, including upper respiratory effects (rhinitis and laryngitis), pulmonary effects (pneumonitis, chronic bronchitis, decreased pulmonary function), potential neurological disorders (manganese-induced Parkinsonism), and high lung cancer and pneumoconiosis death rates. Manganese has been associated with neurological diseases. There is a need to measure nanoparticle airborne concentrations apart from larger particles (for example, in welding fume).
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as D8208-2019 and Pending Publication