ac6b00764_si_001.pdf (432.46 kB)
Detection and Quantification of Silver Nanoparticles at Environmentally Relevant Concentrations Using Asymmetric Flow Field–Flow Fractionation Online with Single Particle Inductively Coupled Plasma Mass Spectrometry
journal contribution
posted on 2016-04-11, 00:00 authored by Khanh An Huynh, Emily Siska, Edward Heithmar, Soheyl Tadjiki, Spiros A. PergantisThe
presence of silver nanoparticles (AgNPs) in aquatic environments could
potentially cause adverse impacts on ecosystems and human health.
However, current understanding of the environmental fate and transport
of AgNPs is still limited because their properties in complex environmental
samples cannot be accurately determined. In this study, the feasibility
of using asymmetric flow field-flow fractionation (AF4) connected
online with single particle inductively coupled plasma mass spectrometry
(spICPMS) to detect and quantify AgNPs at environmentally relevant
concentrations was investigated. The AF4 channel had a thickness of
350 μm and its accumulation wall was a 10 kDa regenerated cellulose
membrane. A 0.02% FL-70 surfactant solution was used as an AF4 carrier.
With 1.2 mL/min AF4 cross-flow rate, 1.5 mL/min AF4 channel flow rate,
and 5 ms spICPMS dwell time, the AF4-spICPMS can detect and quantify
40–80 nm AgNPs, as well as Ag-SiO2 core−shell
nanoparticles (51.0 nm diameter Ag core and 21.6 nm SiO2 shell), with good recovery within 30 min. This system was not only
effective in differentiating and quantifying different types of AgNPs
with similar hydrodynamic diameters, such as in mixtures containing
Ag-SiO2 core–shell nanoparticles and 40–80
nm AgNPs, but also suitable for differentiating between 40 nm AgNPs
and elevated Ag+ content. The study results indicate that
AF4-spICPMS is capable of detecting and quantifying AgNPs and other
engineered metal nanomaterials in environmental samples. Nevertheless,
further studies are needed before AF4-spICPMS can become a routine
analytical technique.
History
Usage metrics
Categories
Keywords
AF 4 channelquantifying AgNPsstudy resultssilver nanoparticles350 μ mparticle inductivelycoreAF 4 carrierplasma mass spectrometryFL40 nm AgNPsaccumulation wall10 kDa regenerated cellulose membrane5 ms spICPMSPlasma Mass Spectrometrymetal nanomaterials30 minhydrodynamic diametersSilver NanoparticlesSingle Particle Inductively
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC