Exploring the upper particle size limit for field flow fractionation online with ICP-MS to address the challenges of water samples from the Taihu Lake

2020 ◽  
Vol 1093 ◽  
pp. 16-27 ◽  
Author(s):  
Jingjing Yang ◽  
Ping Tan ◽  
Tianyin Huang ◽  
Volker Nischwitz
Keyword(s):  
Particle Size ◽  
Water Samples ◽  
Taihu Lake ◽  
Field Flow Fractionation ◽  
Size Limit ◽  
Icp Ms ◽  
Flow Fractionation

scholarly journals Challenges in Determining the Size Distribution of Nanoparticles in Consumer Products by Asymmetric Flow Field-Flow Fractionation Coupled to Inductively Coupled Plasma-Mass Spectrometry: The Example of Al2O3, TiO2, and SiO2 Nanoparticles in Toothpaste

Separations ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 56 ◽  
Author(s):  
Manuel Correia ◽  
Toni Uusimäki ◽  
Allan Philippe ◽  
Katrin Loeschner
Keyword(s):  
Mass Spectrometry ◽  
Particle Size ◽  
Flow Field ◽  
Inductively Coupled Plasma ◽  
Field Flow Fractionation ◽  
Asymmetric Flow ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Flow Fractionation

According to the current European regulation on cosmetics, any ingredient present as a nanomaterial should be indicated in the ingredient list. There is a need for analytical methods capable of determining the size of the relevant ingredients and thus assessing if these are nanomaterials or not. An analytical method based on asymmetric flow field-flow fractionation (AF4) and inductively coupled plasma-mass spectrometry (ICP-MS) was developed to determine the size of particles present in a commercial toothpaste. Multi-angle light scattering (MALS) was used for on-line size determination. The number-based particle size distributions (PSDs) of the particles were retrieved upon mathematical conversion of the mass-based PSDs recovered from the AF4-ICP-MS fractograms. AF4-ICP-MS allowed to separate and detect Al2O3 and TiO2 particles in the toothpaste and to retrieve a correct TiO2 number-based PSD. The potential presence of particles in the lower size range of the Al2O3 mass-based PSD had a strong impact on sizing and nanomaterial classification upon conversion. AF4 coupled with ICP-MS and MALS was found to be a powerful approach for characterization of different particles in a multiple-particle system such as toothpaste. Confirmation of particle size by a secondary method such as single particle ICP-MS or hydrodynamic chromatography was crucial.

Quantitative analysis of virus-like particle size and distribution by field-flow fractionation

2008 ◽  
Vol 99 (6) ◽  
pp. 1425-1433 ◽  
Author(s):  
Yap P. Chuan ◽  
Yuan Y. Fan ◽  
Linda Lua ◽  
Anton P.J. Middelberg
Keyword(s):  
Particle Size ◽  
Quantitative Analysis ◽  
Field Flow Fractionation ◽  
Virus Like Particle ◽  
Flow Fractionation

Preparation of tailor-made supported catalysts using asymmetric flow field flow fractionation and their application in hydrogenation

2014 ◽  
Vol 3 (1) ◽  
pp. 87-98 ◽  
Author(s):  
Jens Baumgard ◽  
Marga-Martina Pohl ◽  
Udo Kragl ◽  
Norbert Steinfeldt
Keyword(s):  
Particle Size ◽  
Flow Field ◽  
Metallic Nanoparticles ◽  
Size Range ◽  
Separation Process ◽  
Proton Nuclear Magnetic Resonance ◽  
Field Flow Fractionation ◽  
Asymmetric Flow ◽  
Size And Shape ◽  
Flow Fractionation

AbstractThe optical, chemical, and catalytic properties of metallic nanoparticles (NPs) depend strongly on their particle size and shape. Therefore, the preparation of monodisperse metallic NPs is very important for fundamental studies and practical applications. However, the isolation of the different structures by separation from a polydisperse sample, especially in the size range below 10 nm, is not well applied so far. Here, the asymmetric flow field flow fractionation (AF4) is adapted for the preparative separation of the Pd NPs regarding their size and shape in the sub-10-nm size range. To prove the efficiency of the applied method, small-angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (TEM) were utilized to determine the particle size distribution at different stages of the separation process. A major benefit of this method compared to most of the other separation techniques, the removal of impurities during the separation process, was proven by proton nuclear magnetic resonance (NMR). The obtained results demonstrate that the AF4 is well suited for the rapid preparation of the purified uniform precious metal NPs at the applied size range. Single fractions of the different-sized and -shaped Pd NPs were deposited on titania (TiO2) and tested in the catalytic hydrogenation of 2,5 hydroxymethylfurfural (HMF) in aqueous solution under mild conditions. While the spherical-shaped particles show a high activity, the separated agglomerated particles show a higher selectivity to the desired products.

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