Isolation characterization techniques for NPs in environmental media


We have developed and begun to optimize techniques that utilize asymmetrical flow field flow fractionation with multi-angle laser light scattering, UV-Vis spectroscopy, and inductively coupled plasma mass spectrometry detection for in situ characterization of Ag NP aggregation state in aqueous samples including soil and sediment pore water. Initial results demonstrate the ability of the technique to characterize Ag NPs in soil pore water and demonstrate differences in partitioning-aggregation  between citrate and PVP capped Ag-NPs.