121st General Meeting of the KCS

Type Symposium
Area Recent Advances in Analytical Chemistry II: Analysis of Environmental Pollutants
Room No. Room 201A
Time FRI 14:50-:
Code ANAL2-2
Subject The simple and familiar way to measure the size and mass of metal nanoparticles in environmental samples
Authors BYUNG-TAE LEE
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Korea
Abstract The management of hazardous substances is based on the risk assessment for ecology including human. Exposure assessment is an important process for both risk assessment and environmental management policy. It depends on the physical and chemical characterization which enables their qualitative and quantitative exposure and behaviors in environment. Nanomaterials(NMs) have been proven to be harmful to the ecosystem by cell membrane breakdown and DNA modification. Single particle inductively coupled plasma mass spectrometry (spICP-MS) is the one of promising technique that has the potential to determined particle size, number concentration, and aggregataion state in environmental samples at environmentally relevant low concentrations(ng/L). The samples containing nanoparticles were analyzed by spICP-MS and provided their size and number-based concentration. It was successfully applied to predict their aggregation structure in water samples. The mass of an aggregates measured by spICP-MS converted to the number of the primary(single) nanoparticle in an aggregates. The dispersed nanoparticles in the environmental waters (e.g., municipal waste waters) and biological tissues (e.g., Daphnia) were also determined by measuring mass concentrations and nano range sizes.
E-mail btlee@gist.ac.kr