NOVEL EXPOSURE ASSESSMENT METHOD USING CHAMBER FOR SPRAY PRODUCTS CONTAINING NANO-TITANIUM DIOXIDE

Abstract

 The purpose of this study is measuring the amount of the nanoparticle generated from the product including nanomaterial in the popular use situation.
 The evaluation approach was used Chamber method to replicate real situation, and electrostatic collector to analyze and observe the produced nanoparticles. In chamber method, air ventilation of HEPA filter could suppress background value, so agglutination of particles were not confirmed. In electrostatic collector, trapping efficiency was 78% under applied voltage 2000 V.
 By using this method, we tried exposure assessment of antibacterial spray. Therefore, the lung deposition amount when the spray using was 1.29×10^-5 mg/kg/day.