Field Flow Fractionation

Products Field Flow Fractionation

Break-through in High Temperature Polymer Separation Technology

The AF2000 HT Series is the world's first commercial HTFFF instrument available and was invented and patented by Postnova Analytics. High Temperature Field-Flow Fractionation is a brand new technology ideally suited for the advanced separation of high molar mass polymers, such as polyethylene and polypropylene. more

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White papers Field Flow Fractionation

  • Asymmetric Flow Field Flow Fractionation (AF4) - A Powerful Method for Polymer Characterization

    The AF4-MALS combined technique can serve as a routine method for polymer analysis and characterization. AF4 provides separation efficiency entirely comparable with traditionally used and so far dominating SEC. In addition, it yields superior separation of branched polymers, polymers containing ultra high molar mass fractions up to at least 108 g/mol, and nanoparticles. This contribution outlines the theoretical background of the method and shows several examples of its use, e.g. separation of high molecular weight polymers and particles. While SEC will certainly continue to be the most frequently employed method of polymer analysis, for many samples the description of molecular structure is more detailed if both SEC and AF4 are used. The possibility to run both SEC and AF4 on the same experimental set-up makes the AF4 method a powerful and versatile tool for the characterization of a variety of synthetic and natural polymers and related materials. more

  • Automated Dynamic Light Scattering

    DLS analysis is a widely applied, non-invasive method for measuring the effective size of molecules in solution. This technique yields valuable information for the characterization of molecules and particles. It facilitates formerly laborious and time consuming measurements, e.g. screening for aggregates or determining optimal crystallization conditions for proteins. The Wyatt Plate Reader is the instrument of choice for any application where molecular size, stability and aggregation are of interest. It reads industry standard microplates with up to 1536 samples automatically and temperature-controlled, if desired. The applications of the technique are wide ranging and include many of the fastest growing areas of research - proteins, biomaterials, liposomes and micelles as well as the established uses for particle sizing and aggregation detection. Conscious of the numerous characterization challenges in the area of drug delivery systems and therapeutic antibodies more

  • Field-Flow Fractionation - The Universal Separation Principle for Particle and Macromolecule Characterization

    High molecular weight polymers, bio molecules or particles in a range of a few nanometers up to several microns are more and more important in science and technology. Many applications are based on the specific properties of these materials. For this reason, an exact knowledge of the molar mass or particle sizes distribution is essential for later application as well as for optimization of the production processes or quality control. In addition the knowledge about the chain structure of macromolecules or biopolymers as well as about the shape of particles is often necessary. For this reason those samples, which often can be very complex systems, have to be separated according to parameters such as e.g. hydrodynamic volume or molecular weight. After the separation process the resulting narrow dispersed fractions are detected with different techniques. more

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AstraNet Systems - Manufacturer and supplier of spectrometers, fluorimeters, spectrophotometers from

home products news applications technical profile contact distributors AstraNet Systems Ltd is a specialist supplier and manufacturer to the UK European and Worldwide spectroscopy market. AstraNet Systems Ltd is a specialist supplier of standard or custom designed spectrophotometers for laboratory, more

cement plant, silo, clinker cooler, pneumatic conveying, grinding, cement packing, gypsum calcining,

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Hobré instruments bv

Products Wobbe Index, BTU and Calorimeters WIM 9900 Series WIM Compas™ Basic WIM Compas™ F WIM Compas™ F with Injection System Wobbe Index Gas Stability System Yamatake Mini GC CO Smouldering System Element Analysis Element analysis Catalyst Analysis Sulphur Analysis Impurities in chemical processes more

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