AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Nanoparticle Detection in Environmentally Relevant Matrices Using DMA-ICP-MS
CHRISTINE LOZA, Charlie Chan, Mark Ellefson, Sue Wolf, Brian Mader, 3M Company
Abstract Number: 357 Working Group: Nanoparticles and Materials Synthesis
Abstract Engineered nanoparticles frequently are used as additives to consumer products to enhance product properties. Understanding the environmental fate and impact of engineered nanoparticles relies on the ability to characterize them at relatively low levels in complex media, which often contains additional naturally occurring nanoparticles. We present the application of a recently developed hyphenated technique combining electrospray aerosol generation, particle size selection using differential mobility analysis (DMA), and elemental analysis using inductively coupled plasma mass spectrometry (ICP-MS) to characterize gold and silver nanoparticles in environmentally relevant water samples including ground water, industrial wastewater, and ecotoxicology test media. The method is capable of detecting nanoparticles of 20-100 nm diameter at part-per-billion (ppb) levels in environmentally relevant aqueous solutions. Following instrument characterization, the DMA-ICP-MS was used to assess the fate of gold nanoparticles in a solution containing daphnia magna. Insights into dose verifications obtained by DMA-ICP-MS will be discussed as well as the method’s performance and the advantages of the hyphenated DMA-ICP-MS over single-particle ICP-MS.