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Related Experiment Videos

Wipe testing for surface contamination by tritiated compounds

J L Campbell1, C R Santerre, P C Farina

  • 1Environmental Health Science Program, University of Georgia, Athens 30602-7610.

Health Physics
|May 1, 1993
PubMed
Summary

The dry wipe test showed low recovery rates for tritium contamination on surfaces. Wet wipe effectiveness depended on contaminant solubility and surface type, impacting radioactive contamination monitoring.

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Area of Science:

  • Radiochemistry
  • Environmental Monitoring
  • Surface Contamination Analysis

Background:

  • Accurate detection of radioactive contamination is crucial for safety.
  • Tritiated compounds like thymidine and triolein are common radiological materials.
  • Standardized wipe testing methods are essential for reliable contamination assessment.

Purpose of the Study:

  • To evaluate the efficacy of the wipe test for detecting tritium contamination.
  • To compare the performance of dry versus wet wipe methods.
  • To assess the influence of different surfaces and solvents on contamination recovery.

Main Methods:

  • Radioactive contamination using tritiated thymidine and triolein was applied to various surfaces.
  • Surfaces included lead, stainless steel, polyurethane, wood, painted lead, floor tile, Formica, and bench paper.

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  • Wipe tests were conducted using dry filter papers or papers pre-wetted with water, methanol, petroleum ether, or ethyl acetate.

    • Main Results:

    • The dry wipe test yielded an average recovery rate of only 3% across all tested surfaces.
    • Wet wipe recovery rates were significantly influenced by the solubility of the tritiated compounds in the chosen solvent.
    • Surface characteristics, such as material and texture, also affected the efficiency of wet wipe contamination removal.

    Conclusions:

    • The dry wipe test is generally ineffective for quantifying tritium contamination.
    • Wet wipe testing offers improved sensitivity, but performance is highly dependent on solvent choice and surface properties.
    • Optimized wet wipe protocols are necessary for reliable assessment of radioactive surface contamination.