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Related Experiment Videos

Variability among polysulphone calibration curves.

G R Casale1, M Borra2, A Colosimo3

  • 1University of Rome 'La Sapienza', Physics Department, P.le A. Moro 2, I-00185, Rome, Italy.

Physics in Medicine and Biology
|August 17, 2006
PubMed
Summary

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This study assessed personal ultraviolet (UV) exposure using polysulphone (PS) dosemeters across diverse Italian environments. Calibration curve variations were linked to UV spectrum, ozone levels, and solar angle, impacting UV dose measurements.

Area of Science:

  • Environmental Science
  • Photochemistry
  • Epidemiology

Background:

  • Personal ultraviolet (UV) exposure is crucial for understanding skin pathologies.
  • Accurate UV dosimetry is essential for epidemiological studies correlating UV exposure and health outcomes.
  • Polysulphone (PS) dosemeters offer a method for measuring personal UV doses.

Purpose of the Study:

  • To investigate the correlation between skin pathologies and personal UV exposure.
  • To evaluate the performance and variability of polysulphone (PS) dosemeters in field conditions.
  • To analyze factors influencing the calibration curves of PS dosemeters.

Main Methods:

  • Conducted 14 field campaigns across urban, semi-rural, and rural Italian sites over all seasons.
  • Utilized polysulphone (PS) dosemeters to measure ambient UV doses.

Related Experiment Videos

  • Obtained PS calibration curves by correlating UV dose with changes in PS film absorbance.
  • Measured UV doses using calibrated broad-band radiometers and electronic dosemeters.

    • Main Results:

    • PS calibration curves varied, primarily differing in a single coefficient.
    • This coefficient was influenced by the solar UV spectrum at the Earth's surface.
    • Variability in calibration curves was attributed to the spectral mismatch between PS and the CIE erythemal action spectrum.
    • The coefficient's variability correlated with total ozone amount and solar zenith angle.

    Conclusions:

    • Polysulphone (PS) dosemeter calibration is sensitive to spectral variations in solar UV radiation.
    • Environmental factors like ozone concentration and solar zenith angle significantly affect UV dosimetry accuracy.
    • Understanding these variations is critical for reliable epidemiological studies on UV exposure and skin health.