Characterization of silver nanoparticles using flow-field flow fractionation interfaced to inductively coupled plasma mass spectrometry

Abstract

Harmon, A.; Hull, M.; Mitrano, D. M.; Ranville, J. F.; and Steevens, J., "Characterization of silver nanoparticles using flow-field flow fractionation interfaced to inductively coupled plasma mass spectrometry" (2010 a b s t r a c tThe ability to detect and identify the physiochemical form of contaminants in the environment is important for degradation, fate and transport, and toxicity studies. This is particularly true of nanomaterials that exist as discrete particles rather than dissolved or sorbed contaminant molecules in the environment. Nanoparticles will tend to agglomerate or dissolve, based on solution chemistry, which will drastically affect their environmental properties. The current study investigates the use of field flow fractionation (FFF) interfaced to inductively coupled plasma-mass spectrometry (ICP-MS) as a sensitive and selective method for detection and characterization of silver nanoparticles. Transmission electron microscopy (TEM) is used to verify the morphology and primary particle size and size distribution of precisely engineered silver nanoparticles. Subsequently, the hydrodynamic size measurements by FFF are compared to dynamic light scattering (DLS) to verify the accuracy of the size determination. Additionally, the sensitivity of the ICP-MS detector is demonstrated by fractionation of g/L concentrations of mixed silver nanoparticle standards. The technique has been applied to nanoparticle suspensions prior to use in toxicity studies, and post-exposure biological tissue analysis. Silver nanoparticles extracted from tissues of the sediment-dwelling, freshwater oligochaete Lumbriculus variegatus increased in size from approximately 31-46 nm, indicating a significant change in the nanoparticle characteristics during exposure.Published by Elsevier B.V.

Cu–Ni nanoalloy phase diagram – Prediction and experiment

“…4). Interesting agreement exists between size dependent ratio d(DLS)/d(TEM) for our Cu-Ni nanoparticles in hexane and for Ag nanoparticles in aqueous solution according to Poda et al [33]. Verification of this agreement needs further experimental examination using additional NPs systems.…”

Assessing nanomaterial exposures in aquatic ecotoxicological testing: Framework and case studies based on dispersion and dissolution

“…Imaging was performed in high vacuum mode using secondary electron (TLD) and backscattered electron (vCD) detectors. Primary particle size was measured using ImagePro software (v7, Media Cybernetics Inc., Bethesda, MD), as in Poda et al (2011). Suspension concentrations were determined by ICP-MS or Graphite Furnace Atomic Absorption Spectroscopy for volume limited samples (ICP-MS, Elan DRC-II, GF-AAS, Pinnacle 900Z, PerkinElmer, Waltham, MA) and UV-vis photospectrometer (Cary 5000 UV-Vis-NIR, Agilent Technologies, Cary, NC).…”

“…Zeta potential was determined from electrophoretic mobility measurements and PZC determined using a BI-ZTU auto-titrator (90 Plus/BI-MAS, Brookhaven Instruments, Holtsville, NY). Dissolved concentrations were determined by 60 min of ultracentrifugation (Beckman Coulter, Inc., 355603, Brea, CA) at 100,000Â g, as previously described (Poda et al, 2011) and validated (Kennedy et al, 2015b).…”

Foreword to the Research Front on Detection of nanoparticles in the environment

“…[16,17] The paper by Furtado et al [18] has succeeded in analysing silver nanoparticles under the near natural conditions of a lake mesocosm using SP-ICPMS (along with other confirmatory techniques). Another solution examined by several researchers has been the coupling of field flow fractionation [18][19][20] or hydrodynamic chromatography [21] with ICPMS in order to reduce some of the problems associated with matrix effects. The paper by Proulx and Wilkinson couples HDC with SP-ICPMS in order to detect nAg in a spiked natural river water sample.…”