Laser-induced breakdown detection combined with asymmetrical flow field-flow fractionation: application to iron oxi/hydroxide colloid characterization

Bouby, M.; Geckeis, Horst; Manh, Thang Ngo; Yun, Jong-Il; Dardenne, Kathy; Schäfer, Thorsten; Walther, Clemens; Kim, Jae-Il

doi:10.1016/j.chroma.2004.03.047

Cited by 40 publications

(11 citation statements)

References 40 publications

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“…Increasingly, a range of different methodologies are becoming available for the nonperturbing and quantitative determination of colloid structure including transmission electron microscopy (TEM) (13), environmental scanning electron microscopy (ESEM) (14,15), fluorescence correlation spectroscopy (FCS) (16), and laser-induced breakdown spectroscopy (LIBD) (17). The study reported here uses the technique of atomic force microscopy (AFM) to probe quantitatively and with minimal perturbation the fine colloids present in an urban catchment.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Freshwater Natural Aquatic Colloids by Atomic Force Microscopy (AFM)

Lead

Muirhead

Gibson

2005

Environ. Sci. Technol.

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Atomic force microscopy (AFM) has been used to image and quantify riverine colloids in a quantitative and relatively nonperturbing manner. Three main classes of material have been imaged including fibrils (about 10 nm in diameter and 100 nm or more in length), discrete, near-spherical, small colloids primarily below 30-50 nm in diameter, and a surface film, of at least several nanometers thickness, which coatsthe entire mica surface within 30 min of exposure to river water. Colloid structure was found to vary as a function of pH, particularly at high pH. Substantially different structures were observed at high pH values, with the loss of the near-spherical colloids possibly due to rearrangement and aggregation. In addition,film thicknesses of up to 100 nm were estimated on the silicon nitride AFM cantilever after 30 h of deposition in the same water (unperturbed and size fractionated). The observation of these surface films has important implications for understanding the mechanisms by which colloids might bind trace elements. In particular, development of surface coatings implies that binding of pollutants (at least initial surface binding) may be dominated by adsorbed surface layers.

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Section: Introductionmentioning

confidence: 99%

Characterization of Freshwater Natural Aquatic Colloids by Atomic Force Microscopy (AFM)

Lead

Muirhead

Gibson

2005

Environ. Sci. Technol.

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“…However, the method mentioned above as well as split-flow thin-cell (SPLITT) fractionation is limited to colloid sizes >100 nm [37,38]. Only flow FFF (FlFFF) has been proven to give colloid size distribution information in the sub-100 nm range including its coupling with sensitive detection techniques as ICP-MS [33,39,40]. To our knowledge, the results presented here demonstrate for the first time that transport induced chromatographic size separation effects can be resolved even for polydisperse natural colloids in the sub-100 nm range using LIBD s-curve analysis.…”

Section: /Gmentioning

confidence: 99%

Size dispersion and colloid mediated radionuclide transport in a synthetic porous media

Delos

Walther

Schäfer

et al. 2008

Journal of Colloid and Interface Science

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“…The second method was based on the use of size standards, so that the relationship between retention time and size can be established for fixed flow conditions [e.g. 23,24,25,26]. Single monodisperse suspensions of Ag NPs (10 nm from PlasmaChem, Berlin, Germany; 40 nm and 100 nm from Sigma Aldrich, Saint Louis, USA), and SiO 2 NPs (10 nm and 20 nm from PlasmaChem, Berlin, Germany; and 150 nm from Sigma Aldrich, Saint Louis, USA) were injected and their known size (core-particle size) plotted against the resulting retention ratio R. The curve-fitting equations were then determined for the two NP types according to Eq.…”

Section: Ffff Size Calibration Proceduresmentioning

confidence: 99%

Size determination and quantification of engineered cerium oxide nanoparticles by flow field-flow fractionation coupled to inductively coupled plasma mass spectrometry

Sánchez-García

Bolea

Laborda

et al. 2016

Journal of Chromatography A

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Facing the lack of studies on characterization and quantification of cerium oxide nanoparticles (CeO2 NPs), whose consumption and release is greatly increasing, this work proposes a method for their sizing and quantification by Flow Field-flow Fractionation (FFFF) coupled to Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Two modalities of FFFF (Asymmetric Flow- and Hollow Fiber-Flow Field Flow Fractionation, AF4 and HF5, respectively) are compared, and their advantages and limitations discussed. Experimental conditions (carrier composition, pH, ionic strength, crossflow and carrier flow rates) are studied in detail in terms of NP separation, recovery, and repeatability. Size characterization of CeO2 NPs was addressed by different approaches. In the absence of feasible size standards of CeO2 NPs, suspensions of Ag, Au, and SiO2 NPs of known size were investigated. Ag and Au NPs failed to show a comparable behavior to that of the CeO2 NPs, whereas the use of SiO2 NPs provided size estimations in agreement to those predicted by the theory. The latter approach was thus used for characterizing the size of CeO2 NPs in a commercial suspension. Results were in adequate concordance with those achieved by transmission electron microscopy, X-ray diffraction and dynamic light scattering. The quantification of CeO2 NPs in the commercial suspension by AF4-ICP-MS required the use of a CeO2 NPs standards, since the use of ionic cerium resulted in low recoveries (99 ± 9% vs. 73 ± 7%, respectively). A limit of detection of 0.9 μg L(-1) CeO2 corresponding to a number concentration of 1.8 × 1012 L(-1) for NPs of 5 nm was achieved for an injection volume of 100 μL.

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Laser-induced breakdown detection combined with asymmetrical flow field-flow fractionation: application to iron oxi/hydroxide colloid characterization

Cited by 40 publications

References 40 publications

Characterization of Freshwater Natural Aquatic Colloids by Atomic Force Microscopy (AFM)

Characterization of Freshwater Natural Aquatic Colloids by Atomic Force Microscopy (AFM)

Size dispersion and colloid mediated radionuclide transport in a synthetic porous media

Size determination and quantification of engineered cerium oxide nanoparticles by flow field-flow fractionation coupled to inductively coupled plasma mass spectrometry

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