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Chacterization of biopolymers and synthetic polymers using asymmetric flow field-flow fractionation (AF4) and thermal field-flow fractionation (TF3) coupled to multi-angle light scattering (MALS)
In this presentation, the application of AF4 for the characterization of biopolymers in aqueous solvents and TF3 for the characterization of synthetic polymers in organic solvents was demonstrated. Several application examples showed the possibilities of the FFF techniques and the results that can be achieved when FFF separation methods are coupled with multi-angle light scattering (MALS) detection.

Asymmetrical flow field-flow fractionation for trace level analysis of engineered silver nanomaterials in river water
In this study, Postnova demonstrates the applicability of AF4 for trace level analysis of AgNM in river water. AF4 reveals to be a promising tool to study the fate and behavior of AgNM in the environment.

Advanced characterization of polymers using different FFF-techniques
This poster shows a comparison of SEC, AF4 and TF3 in the analysis of polymers.

Field-flow fractionation - a powerful equipment for investigation of the toxic potential of nanoparticles
This poster shows that FFF is the method of choice for the characterization of nanomaterial due to its unique capabilities like broad separation range, short analysis times and the huge flexibility regarding to different eluents or samples.

FFF as a fast and powerful tool for high-end characterization of nano-scale materials
A variety of different nano applications are described in this presentation, they illustrate the universal applicability of FFF. With a single FFF channel sizes ranging from a few nanometers up to several microns can be characterized. The separation can be customized just by simple adjustment of the cross-flow or centrifugal gradient.

Polymer characterization using thermal FFF
This application note shows an analysis of PS and PMMA by SEC and thermal FFF, and an investigation of PEO-PS homopolymer mix by thermal FFF.

Latex nanoparticle analysis by flow FFF - DLS coupling
The FFF-Platform using different FFF variants in combination with appropriate detectors, such as DLS or MALS is a highly valuable tool for accurate analysis and reliable results. It was shown that FFF-DLS online-coupling is a powerful tool for analysis of mixed latex nanoparticles as traditional batch DLS measurements suffer from a „size-averaging“ effect generating missleading data.

Application of flow and thermal field-flow fractionation for optimized separation of various polymer systems
In this application, it was demonstrated that SEC coupled to a light scattering detector is not sufficient for analyzing ultra-high molar mass or strongly branched polymer samples. A complete analysis of branched LDPE with HT-AF4 was shown and the correct separation was confirmed with NIST reference material.

Separation and speciation of nanoparticles with different field-flow fractionation techniques
The presented work illustrates the broad applicability of the different FFF-techniques for characterization of nanomaterial from different origin in various matrices. The note presents and shows a comparison of asymmetric flow FFF (AF4) and centrifugal FFF (CF3).

Postnova model 9050 ICP-MS hardware interface
PN9050 is a special Interface for Agilent ICP-MS systems: it supports Agilent 7500 and 7700 ICP-MS.

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