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Postnova EAF2000 electrical asymmetrical flow FFF system
The Postnova EAF2000 system is based on the AF2000 asymmetrical flow FFF module, with an additional Electrical FFF module, a special EAF4 channel and a software module. The EAF2000 is ideal for many applications in the domains of biopharm, environment and nanomaterials.

Measurement of length and thickness of cellulose nanocrystals using Asymmetrical Flow FFF and Multi Angle Light Scattering
In this study a CNC sample isolated from softwood sulfite pulp was analyzed by AF4-MALS to measure the length and thickness of the crystals as a function of size.

Miniaturized asymmetrical flow field-flow fractionation for the fast separation of nanoparticle mixtures
This application note demonstrates how miniaturized asymmetrical flow field-flow fractionation (mAF4) is a powerful complement to AF4 performed with a conventional analytical cartridge. Its low operational costs along with its fast analysis times and low sample consumption renders mAF4 a valuable tool for fast screening analyses and studies, when fully optimized peak resolution is not required.

Flow FFF principle
Flow FFF allows for stable flows/pressures at any time during injection, focussing, elution, and also many other dinstinctive advantages.

Asymmetrical flow field-flow fractionation coupled with ICP-MS for multi element analysis of plasma proteins
This work demonstrates that FFF-ICP-MS is a promising tool for the non-denaturing and element-selective detection of proteins such as human albumin and transferrin, which are involved in many health studies. This is particularly attractive for applications in which the two plasma proteins act as binders of the same element (e.g. vanadium in diabetes studies).

Characterization of rubber polymers by flow FFF
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. This poster demonstrates 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!

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.

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