| Document ID (ISN) | 60734 |
| CIS number |
93-1605 |
| ISSN - Serial title |
0002-8894 - American Industrial Hygiene Association Journal |
| Year |
1992 |
| Convention or series no. |
|
| Author(s) |
Stebbins A.I., Horstman S.W., Daniell W.E., Atallah R. |
| Title |
Cobalt exposure in a carbide tip grinding process |
| Bibliographic information |
Mar. 1992, Vol.53, No.3, p.186-192. Illus. 25 ref. |
| Abstract |
A company producing carbide tip saw blades for the woodworking industry was investigated. Cobalt exposure was characterised by ambient air monitoring, particle size determination, and biological monitoring. Area sampling for cadmium, cobalt, and tungsten indicated low ambient air levels in all manufacturing areas except the grinding department, which had cobalt air levels approaching the threshold limit value of 0.05mg/m3. Area airborne cobalt exposure levels measured over six shifts in the grinding department ranged from 0.017 to 0.12mg/m3 for the total collection method and 0.002 to 0.028mg/m3 for the method collecting respirable particles. Cobalt content in the total and respirable fractions was similar. Urine monitoring indicated production workers have elevated cobalt levels, and the grinders' levels were higher than other production workers. The grinding coolant was found to have elevated cobalt concentrations. A survey of coolants from nine carbide grinding shops indicated that the elevated cobalt concentrations may be common. |
| Descriptors (primary) |
carbides; machine tools; cobalt; hazard evaluation; grinding machines; saws; respirable dust |
| Descriptors (secondary) |
tungsten; particle size determination; cadmium; exposure tests; urine monitoring; air sampling |
| Document type |
D - Periodical articles |
| Country / State or Province | USA |
| Subject(s) |
Toxic and dangerous substances
|
| Broad subject area(s) |
Chemical safety
|
| Browse category(ies) |
Risk evaluation
Inorganic substances
|
