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Woodworkers' exposure to tannins

M A Bianco1, H Savolainen

  • 1Ecotoxicology Service, Canton of Geneva, Switzerland.

Journal of Applied Toxicology : JAT
|July 1, 1994
PubMed
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Tannin concentration in wood dust varies by wood type, with hardwoods like oak having higher levels than softwoods. Measuring tannins in dust can indicate exposure to hardwood dust in workplaces.

Area of Science:

  • Environmental Science
  • Occupational Health
  • Analytical Chemistry

Background:

  • Wood dust exposure is a concern in woodworking environments.
  • Tannins are naturally occurring compounds in wood with varying concentrations.
  • Hardwoods generally contain higher tannin levels than softwoods.

Purpose of the Study:

  • To quantify tannin concentrations in hardwood and softwood dust.
  • To assess the feasibility of using tannin analysis as an indicator of hardwood dust exposure.
  • To measure total dust and tannin concentrations in occupational settings.

Main Methods:

  • Spectrophotometric analysis was employed to determine tannin concentrations in dust powder and filter samples.
  • The method's low detection limit (1.5 µg/sample) ensured no interference from cellulose ester filters.

Related Experiment Videos

  • Total dust and tannin levels were measured in five different woodworking shops.

    • Main Results:

    • Tannin concentrations ranged from 1.6 ± 0.3 mg/g for softwoods (fir) to 80 ± 30 mg/g for hardwoods (oak).
    • In occupational settings, total dust concentrations varied from 0.2 to 20 mg/m³, and tannin concentrations ranged from 2 to 341 µg/m³.
    • A positive correlation was observed between higher tannin concentrations and hardwood dust presence.

    Conclusions:

    • Tannin concentration analysis is a viable method for assessing wood dust composition.
    • Higher tannin levels in wood dust can serve as a reliable indicator of exposure to hardwood dust.
    • This method can help identify and manage risks associated with hardwood dust in occupational environments.