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Multiple velocity aerosol sampling inlets to conform with revised ACGIH criteria.

Authors
Xiong-JQ; Fang-CP
Source
NIOSH 1999 Jun; :1-24
Link
NIOSHTIC No.
20023685
Abstract
A better evaluation of the hazard posed by airborne particles is possible if particles that do not contribute to the hazard are excluded from the airborne concentration analysis. Therefore, the criteria for the inhalable, thoracic and respirable fractions of airborne particles, proposed by Soderholm (1989), were adopted by the American Conference of Government Industrial Hygienists (ACGIH), the Comite European de Normalisation (CEN) and the International Standards Organization (ISO). However, currently available commercialized inlets, including cyclones and multi-nozzle impactors with uniform jet velocities do not comply with these revised criteria. The primary objective of this research is to develop new aerosol sampling inlets. These inlets, using an entirely new concept, can comply with size-selective aerosol sampling criteria better than the inlets currently being used. A prototype array of single stage impactors with different jet velocities has been developed in the Phase I study. The experimental results show that the impaction collection performance of the new inlet meets the proposed expectations very well in the size range of testing particles, but particle losses in the inlet body were also found to be significant. The test results showed that some design modifications would improve the performance of this device. These modifications and further testing are beyond the scope of the current Phase I work.
Keywords
Airborne-particles; Standards; Industrial-hygiene; Aerosol-particles; Aerosol-sampling; Sampling-equipment; Inhalants; Equipment-design; Testing-equipment; Exposure-methods; Respirable-dust
Contact
JQX Lab, 701 W. Hackberry Drive, Chandler, AZ 95248
Publication Date
19990610
Document Type
Final Grant Report
Funding Amount
97000
Funding Type
Grant
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R43-OH-003437
NIOSH Division
OEP
Priority Area
Research Tools and Approaches; Exposure Assessment Methods
Source Name
National Institute for Occupational Safety and Health
State
AZ; GA
Performing Organization
JQX Lab, Chandler, Arizona
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