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Tracking the Transformation of Nanoparticulate and Ionic Silver at Environmentally Relevant Concentration Levels by Hollow Fiber Flow Field-Flow Fractionation Coupled to ICPMS

It is a great challenge to monitor the physical and chemical transformation of nanoparticles at environmentally relevant concentration levels, mainly because the commonly used techniques like dynamic light scattering and transmission electron microscopy are unable to characterize and quantify trace level nanoparticles in complex matrices. Herein, we demonstrate the on-line coupled system of hollow fiber flow field-flow fractionation (HF5), minicolumn concentration, and inductively coupled plasma mass spectrometry (ICPMS) detection as an efficient approach to study the aggregation and chemical transformation of silver nanoparticles (AgNPs) and ionic Ag species in the aqueous environment at ng/mL levels. Taking advantage of the in-line dialysis of HF5, the selective capture of Ag(I) species by the resin in minicolumn, and the high selectivity and sensitivity of ICPMS detection, we recorded the aggregation of 10 ng/mL AgNPs in complex matrices (e.g., NOM, Na+/Ca2+), revealing an interesting tiny AgNPs format...

Authors:   Zhi-Qiang Tan; Yong-Guang Yin; Xiao-Ru Guo; Meseret Amde; Myeong Hee Moon; Jing-Fu Liu; Gui-Bin Jiang
Journal:   Environmental Science & Technology
Year:   2017
DOI:   10.1021/acs.est.7b03439
Publication date:   23-Oct-2017
Facts, background information, dossiers
  • selectivity
  • inductively coupled plasma
  • environment
More about American Chemical Society Publications
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