The objectives of this study were (1) to develop methodology for
characterization and detection of AuNPs and AgNPs size distribution
and particle number concentration in environmental water, (2) to
track the stability of AuNPs and AgNPs at environmentally relevant concentrations,
and (3) to analyze AuNPs and AgNPs in environmental
samples. In this study, we chose AuNP and AgNP as the representative
metallic nanoparticle because of their broad applications and potential
release into the environment.