Laboratory evaluation of a personal aethalometer for assessing airborne carbon nanotube exposures
- 14 April 2020
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Occupational and Environmental Hygiene
- Vol. 17 (6), 262-273
- https://doi.org/10.1080/15459624.2020.1740237
Abstract
Aethalometers are direct-reading instruments primarily used for measuring black carbon (BC) concentrations in workplace and ambient atmospheres. Aethalometer BC measurements of carbon nanotubes (CNTs) were compared to measurements made by other methods when subjected to high (>30 µg/m3) and low (1–30 µg/m3) CNT aerosol concentrations representing worst-case and typical workplace concentrations, respectively. A laboratory-based system was developed to generate carbon black, as an example of a nearly pure carbon, micron-sized aerosol, and two forms of multi-walled carbon nanotubes (CNTs): small-diameter (30 µg/m3. However, aethalometer accuracy remains consistent over time when sampling general work zones in which CNT concentrations are expected to be 3. A calibration check of aethalometer response relative to EC measured with Method 5040 is recommended to ensure that the aethalometer readings are not under sampling CNT concentrations as occurred with one of the CNTs evaluated in this study.Keywords
This publication has 30 references indexed in Scilit:
- Occupational Exposure Assessment in Carbon Nanotube and Nanofiber Primary and Secondary ManufacturersAnnals of Work Exposures and Health, 2012
- Diameter and rigidity of multiwalled carbon nanotubes are critical factors in mesothelial injury and carcinogenesisProceedings of the National Academy of Sciences of the United States of America, 2011
- Exposure assessment of carbon nanotube manufacturing workplacesInhalation Toxicology, 2010
- Monitoring Multiwalled Carbon Nanotube Exposure in Carbon Nanotube Research FacilityInhalation Toxicology, 2008
- Controlled generation of black carbon particles from a diffusion flame and applications in evaluating black carbon measurement methodsAtmospheric Environment, 2007
- Absorption of light by soot particles: determination of the absorption coefficient by means of aethalometersJournal of Aerosol Science, 2003
- A Small Whole-Body Exposure Chamber for Laboratory UseInhalation Toxicology, 2003
- The dependence of the specific attenuation cross-section on black carbon mass fraction and particle sizeAtmospheric Environment, 1997
- Experimental grain dust atmospheres generated by wet and dry aerosolization techniquesAmerican Journal of Industrial Medicine, 1994
- The aethalometer — An instrument for the real-time measurement of optical absorption by aerosol particlesScience of The Total Environment, 1984