Quantitative assessment of occupational exposure to total indium dust in Japanese indium plants

: This study quantitatively assessed personal exposure of 86 workers to indium compounds as total dust at 11 Japanese indium plants. The personal exposures to indium concentrations in the breathing zone during an 8 h work-shift were determined by ICP-MS. The arithmetic mean indium concentration of all the workers was 0.098 mg Indium (In)/m3, with individual values ranging from 0.0001 to 1.421 mg In/m3. There were 11 workers whose exposure to indium concentrations exceeded the American Conference of Governmental Industrial Hygienists' Threshold Limit Value-Time Weighted Average (TLV-TWA) of 0.1 mg In/m3. Based on the condition TLV-TWA

Keywords:

• Pathology
• Biochemistry
• Medicine
• Indium
• Toxicology
• occupational exposure
• Percentile
• Occupational exposure limit
• quantitative assessment
• Indium tin oxide
• breathing zone
• Arithmetic mean

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