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Updated: Aug 11, 2026
06:43
Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
Experimental methodologies and preliminary transfer factor data for estimation of dermal exposures to particles
C E Rodes1, J R Newsome, R W Vanderpool
1Center for Engineering and Environmental Research, Research Triangle Institute, PO Box 12194, Research Triangle Park, NC 27709, USA. charlesr@rti.org
Summary
Particle transfer from indoor surfaces to skin was quantified. Surface roughness, hand dampness, and repeated contact significantly influenced transfer rates, with smaller particles showing higher metal concentrations.
Area of Science:
- Environmental Science
- Toxicology
- Occupational Health
Background:
- Understanding particle transfer from indoor surfaces to human skin is crucial for assessing exposure risks.
- Previous studies have lacked comprehensive data on mass transfer dynamics across various surfaces and conditions.
Purpose of the Study:
- To quantify particle mass transfer from indoor surfaces to human skin.
- To evaluate the influence of surface type, skin condition, and particle characteristics on transfer efficiency.
Main Methods:
- Developed methods using fluorescein-tagged Arizona Test Dust (ATD) as a housedust surrogate.
- Utilized a uniform surface deposition chamber to control particle loading and size fractions.
- Quantified particle transfer to wet and dry skin from stainless steel, vinyl, and carpet surfaces.
Main Results:
- Particle transfer decreased with increased surface roughness (carpet < vinyl < steel).
- Hand dampness significantly increased particle mass transfer.
- Transfer efficiency reduced with consecutive presses, reaching equilibrium after ~100 presses.
- Smaller particles (<25 microns) exhibited higher concentrations of metals (Pb, Mn, Cd, Cr, Ni).
Conclusions:
- Dermal transfer factors are significantly influenced by surface properties and skin hydration.
- Particle size is a critical factor in the dermal uptake of associated contaminants.
- Findings provide essential data for indoor exposure assessment and risk management strategies.
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