Abstract
Various experimental researches have been conducted recently on Semivolatile organic compounds (SVOC) in house dust. Those emission souces would be plasticizers and flame retardants used in products. Part of substances of plasticizers and flame retardants are subject to various restrictions due to concerns about human health. Since SVOCs have low vapor pressure and high adsorptivity, those exist not only as gas phase but also as particle phase and house dust phase in indoor environments. Those measurement processes would be technically complicated. Therefore, we focused on those transfer routes and estimated SVOC concentration in house dust with phase partitioning models. For plasticizers and brominated flame retardants, estimated values were obtained on the safety side of factor 1.78-13.1 (med.). Those slopes of regression lines were 0.838-1.28, which were close to 1. From a macroscopic viewpoint, these models can practically predict SVOC concentrations in house dust. Whereas estimated values for organophosphate flame retardants with LogKoa less than about 10 were underestimated by 2 orders of magnitude. These would be caused by existence of other transfer routes or differences between Koa and actual partitioning coefficient.
