A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES
Current sampling instruments of respirable dust (RD) may over estimate the inhaled dose by up to 400% depending on the size distribution of airborne dust. This limitation and the practice of assigning a single value for RD to all jobs regardless of the level of activity are incompatible with the adv...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
1987-06-01
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| Series: | Iranian Journal of Public Health |
| Subjects: | |
| Online Access: | https://ijph.tums.ac.ir/index.php/ijph/article/view/2743 |
| _version_ | 1818739545910280192 |
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| author | M. Ghiasseddin; Y. Hamad |
| author_facet | M. Ghiasseddin; Y. Hamad |
| author_sort | M. Ghiasseddin; Y. Hamad |
| collection | DOAJ |
| description | Current sampling instruments of respirable dust (RD) may over estimate the inhaled dose by up to 400% depending on the size distribution of airborne dust. This limitation and the practice of assigning a single value for RD to all jobs regardless of the level of activity are incompatible with the advances in occupational epidemiology. A new dust sampler designed to estimate pulmonary deposition (PD) was developed to alleviate these limitations. The device consists of a 10 mm diameter microscope cover slip. Estimation of PD is obtained by selecting the appropriate air flow rate and diameter of impactor so that the combined performance will simulate the bell shaped curves of PD at various respiratory frequencies and tidal volumes. To obtain better matching of PD, this configuration was selected, rather than two impactors in series, (impactors have sharp cut- off curves). A cyclone can also collect large amounts of the sampler wax evaluated using monodispersed aerosols 1.1, 2.7, 4.7, 9.8, um and geometric standard deviations 1.2. The results indicate that PD is estimated very closely by the new sampler. |
| first_indexed | 2024-12-18T01:26:33Z |
| format | Article |
| id | doaj.art-8c780837d1ae49c6aa1a65990b91c3a2 |
| institution | Directory Open Access Journal |
| issn | 2251-6085 2251-6093 |
| language | English |
| last_indexed | 2024-12-18T01:26:33Z |
| publishDate | 1987-06-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Public Health |
| spelling | doaj.art-8c780837d1ae49c6aa1a65990b91c3a22022-12-21T21:25:43ZengTehran University of Medical SciencesIranian Journal of Public Health2251-60852251-60931987-06-01161-4A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES M. Ghiasseddin; Y. Hamad0 Current sampling instruments of respirable dust (RD) may over estimate the inhaled dose by up to 400% depending on the size distribution of airborne dust. This limitation and the practice of assigning a single value for RD to all jobs regardless of the level of activity are incompatible with the advances in occupational epidemiology. A new dust sampler designed to estimate pulmonary deposition (PD) was developed to alleviate these limitations. The device consists of a 10 mm diameter microscope cover slip. Estimation of PD is obtained by selecting the appropriate air flow rate and diameter of impactor so that the combined performance will simulate the bell shaped curves of PD at various respiratory frequencies and tidal volumes. To obtain better matching of PD, this configuration was selected, rather than two impactors in series, (impactors have sharp cut- off curves). A cyclone can also collect large amounts of the sampler wax evaluated using monodispersed aerosols 1.1, 2.7, 4.7, 9.8, um and geometric standard deviations 1.2. The results indicate that PD is estimated very closely by the new sampler.https://ijph.tums.ac.ir/index.php/ijph/article/view/2743Respirable dustPneumoconiosesImpactorOccupational Health |
| spellingShingle | M. Ghiasseddin; Y. Hamad A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES Iranian Journal of Public Health Respirable dust Pneumoconioses Impactor Occupational Health |
| title | A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES |
| title_full | A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES |
| title_fullStr | A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES |
| title_full_unstemmed | A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES |
| title_short | A MORE RATIONAL METHOD FOR SAMPLING OF AIRBORNE FIBROCENIC DUST IN EPIDEMIOLOGY OF PNEUMOCONIOSES |
| title_sort | more rational method for sampling of airborne fibrocenic dust in epidemiology of pneumoconioses |
| topic | Respirable dust Pneumoconioses Impactor Occupational Health |
| url | https://ijph.tums.ac.ir/index.php/ijph/article/view/2743 |
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