Silver nanoparticles (AgNPs) exist in a cycle of transformations under environmentally and biologically relevant conditions.  As these conditions vary, the equilibrium of these cycles between AgNP and ionic forms are shifted, presenting measurement challenges.  These challenges can lead to nanoecotoxicity measurement artifacts, which can be avoided with proper planning [Petersen et al., ES&T 2014, 48, p4226].  Recent advances have led to consensus methods and numerous datasets.  For example, UV-vis measurements of particle concentrations enables measurements of AgNP dissolution kinetics without processing or separation as validated by chemical analysis [NIST SP-1200-13], and standardized sample preparation methods for specific applications such as textiles  [NIST SP-1200-8].  Example data on consumer products including commercially available dietary supplements will also be included.<br/>

Measurements of silver ions and silver nanoparticles in biologically and environmentally relevant conditions

251st National Meeting (2016)

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