| Document ID (ISN) | 73607 |
| CIS number |
99-1569 |
| ISSN - Serial title |
0167-6369 - Environmental Monitoring and Assessment |
| Year |
1997 |
| Convention or series no. |
|
| Author(s) |
Kok P.W., Ong H.Y., Wong M.K., Au W.K., Tan K.T., Phoon W.H., Ong C.N. |
| Title |
Environmental and biological assessment of exposure to benzene among petroleum workers |
| Bibliographic information |
1997, Vol.44, p.425-431. Illus. 13 ref. |
| Abstract |
Occupational exposure to benzene was measured in two gasoline marketing terminals and five major refineries in Singapore. A total of 280 workers were monitored over two years. Results revealed wide variations in exposure, from 0.01 to 13.6ppm for personal time weighted average exposure over the whole workshift. The exposure of truck drivers appeared to be the highest. The average benzene exposure for process operators was relatively low. Lowest benzene exposure was found in the laboratory technicians. As cigarette smoking is known to affect metabolism of benzene, data analyses on the relationships with environmental exposure were conducted only on 190 nonsmokers. The results showed that urinary trans,trans-muconic acid, unmetabolized benzene in urine and benzene in blood were better biomarkers for low level benzene exposure as compared to urinary phenolic metabolites in urine, such as hydroquinone, phenol and catechol. Topics: benzene; trans,trans-muconic acid; determination in air; determination in blood; determination in urine; exposure evaluation; exposure tests; job-exposure relation; metabolic process; petroleum refining; smoking; urinary metabolites. |
| Descriptors (primary) |
benzene; exposure tests; petroleum refining; exposure evaluation |
| Descriptors (secondary) |
metabolic process; trans,trans-muconic acid; smoking; determination in urine; job-exposure relation; determination in air; determination in blood; urinary metabolites |
| Document type |
D - Periodical articles |
| Country / State or Province | Singapore |
| Subject(s) |
Toxic and dangerous substances
|
| Broad subject area(s) |
Chemical safety
|
| Browse category(ies) |
Petroleum and natural gas industry
Petrochemical industry
Exposure evaluation
Biological monitoring
Aromatic hydrocarbons
|
