Author Interviews, Pediatrics, Toxin Research, University Texas / 21.12.2014
Crib Mattresses May Emit Phthalates
MedicalResearch.com Interview with:
Ying Xu
Assistant Professor, Ph.D.
Department of Civil, Architectural and Environmental Engineering
University of Texas, Austin
Medical Research: What is the background for this study? What are the main findings?
Response: Phthalates have been widely used as plasticizers to enhance the flexibility of polyvinyl chloride (PVC) products. They are ubiquitous and persistent indoor pollutants and may result in profound and irreversible changes in the development of human reproductive tract.
In this study, we found that the emissions of phthalates and phthalate alternatives increase significantly with increasing temperature. We developed an emission model and validated the model via chamber experiments. Further analysis showed that, in infant sleep microenvironments, an increase in the temperature of mattress can cause a significant increase in emission of phthalates from the mattress cover and make the concentration in breathing zone about four times higher than that in the room, resulting in potentially high exposure. In residential homes, an increase in the temperature from 25 to 35 ºC can elevate the gas-phase concentration of phthalates by more than a factor of 10, but the total airborne concentration may not increase that much for less volatile compounds.





















