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Related Experiment Videos

Chronic occupational exposure to toluene

H Tähti, S Kärkkäinen, K Pyykkö

    International Archives of Occupational and Environmental Health
    |January 1, 1981
    PubMed
    Summary

    Urinary hippuric acid effectively measures chronic toluene exposure in tarpaulin factory workers. Toluene elimination continues hours after occupational exposure ends, with minimal impact on most biological markers.

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    Area of Science:

    • Occupational Health
    • Toxicology
    • Biomonitoring

    Background:

    • Toluene is a common industrial solvent with potential health risks from chronic occupational exposure.
    • Assessing exposure levels and biological effects in workers is crucial for workplace safety.

    Purpose of the Study:

    • To evaluate chronic toluene exposure in tarpaulin factory workers.
    • To assess the utility of urinary hippuric acid as a biomarker for toluene exposure.
    • To investigate the correlation between toluene exposure and various biological parameters.

    Main Methods:

    • Studied 78 workers (46 exposed, 32 unexposed) in a tarpaulin factory.
    • Measured airborne toluene concentrations (20-200 ppm).
    • Analyzed urinary hippuric acid excretion at end-of-shift and overnight; assessed other biological parameters.

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    Main Results:

    • Urinary hippuric acid excretion correlated well with airborne toluene concentrations, indicating its effectiveness as a biomarker.
    • Toluene elimination persisted for several hours post-exposure, as shown by overnight urine samples.
    • Most biological parameters, including blood leukocyte count, showed no significant correlation with toluene exposure and remained within normal ranges.

    Conclusions:

    • Urinary hippuric acid is a reliable indicator of chronic occupational toluene exposure.
    • Long-term toluene exposure at studied levels did not significantly affect most measured biological parameters.
    • Workplace monitoring and biomonitoring are essential for managing occupational toluene exposure risks.