2015 Fiscal Year Final Research Report
Occupational Exposure Limits for indium compounds: Personal indium exposure concentration in respirable dusts and serum indium level
| Project/Area Number |
26860443
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Hygiene and public health
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| Research Institution | Keio University |
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Principal Investigator |
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| Research Collaborator |
Omae Kazuyuki 慶應義塾大学, 医学部, 教授 (60118924)
Nakano Makiko 慶應義塾大学, 医学部, 講師 (70384906)
Tanaka Shigeru 十文字学園女子大学, 人間生活学部, 教授 (60171758)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | インジウム / 産業疫学 / 生物学的モニタリング / 先端産業 |
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| Outline of Final Research Achievements |
The aim of this study was to assess the relationship between indium exposure concentration in the respirable dust fraction (In-E) and indium in serum (In-S) in workers. A total of 39 workers were studied. The study subjects were categorized into 3 groups, namely, smelting workers (n=7), ITO workers (n=6) in an ITO grinding plant, and other workers (n=26).
In-E and In-S ranged from 0.039-24.0 μg/m3 and 0.1- 8.50 μg/L. The simple regression equation was log(In-S) = 0.322 × log(In-E) - 0.443. The simple correlation coefficients for the smelting workers, ITO workers and other workers were 0.489, 0.812 and 0.163, respectively. The differences in the relationships among the three groups suggest that In-S may vary with the chemical form to which the workers were exposed. In-E and In-S seem to be positively correlated, but more data are needed to draw final conclusions.
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| Free Research Field |
医歯薬学
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