Personal indium exposure concentration in respirable dusts and serum indium level

Satoko Iwasawa, Makiko Nakano, Hiroyuki Miyauchi, Shigeru Tanaka, Yaeko Kawasumi, Ichiro Higashikubo, Akiyo Tanaka, Miyuki Hirata, Kazuyuki Omae

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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. Methods: 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 0.004–24.0 μg/m3 and 0.1–8.50 μg/L, respectively. 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. The correlation coefficient was higher for both smelting and ITO workers than for other workers.

Original languageEnglish
Pages (from-to)87-90
Number of pages4
JournalIndustrial Health
Issue number1
Publication statusPublished - 2017


  • Biological monitoring
  • Indium
  • Indium in serum
  • Indium-tin oxide target plate (ITO)
  • Personal respirable dust
  • Smelting worker

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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