Exposure assessment method for products containing nanomaterials using a gas sample introduction system for ICP-MS

[摘要] General aerosol-measuring instruments allow real-time measurements of air particle concentrations. However, these measurements cannot distinguish free particles from target nanomaterials because they do not differentiate nanomaterials. The purpose of this study is investigation of the quantitative nature of atmospheric nanoparticles using GED (Gas Exchange Device)-ICP-MS to detect and measure nanoparticles as an element. The per particle signal intensity increased proportionally to the volume until the particle size reaches 120 nm. For all particle sizes from 20 nm to 160nm, the measured values of FMPS (Fast Mobility Particle Sizer) were consistently higher than those for ICP-MS. The system will be able to adapt to an exposure assessment of CNT (Carbon Nanotube) because carbon-base materials can be identified and quantified as long as an index element can be found.

[发布机构] Safety Research Center, Kyoto University, Rakuyu Bekkan, Yoshida, Sakyo, Kyoto; 606-8316, Japan^1;J-SCIENCE LAB Co. Ltd., 3-1 Kamitoba, Minami, Kyoto; 601-8144, Japan^2;National Institute of Occupational Safety and Health, 6-21-1 Kawasakai, Tama; 214-8585, Japan^3;Graduate School of Engineering, Kyoto University, Katsura, Nishigyo, Kyoto; 615-8540, Japan^4

[效力级别] 医药卫生

[关键词] Exposure assessment;Fast mobility particle sizers;Free particles;Measured values;Measuring instruments;Particle concentrations;Particle signals;Real time measurements