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Exploring the Links Between Rheology, Gel Permeation Chromatography and Particle Characterization

Malvern Panalytical
8 May 2011
bridget bridget
Laboratory Director

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At the 7th Annual European Rheology Conference (AERC 2011), May 10 - 14, 2011, Suzdal, Russia, Malvern Instruments will focus on how to maximize analytical benefit and impact by combining rheology with complementary techniques such as gel permeation chromatography and particle characterization. To find out more about the symbiotic nature of these core analytical technologies, or any other aspect for rheological measurement, visit the Malvern stand for informed debate and the latest product news.

On display will be the Kinexus rotational rheometer, a system designed to meet the rheological requirements of users at every level. Kinexus can be used to precisely characterize the widest range of materials from weakly structured liquids to soft solids, a key feature being the rSpace software interface which makes Standard Operating Procedure (SOP)-driven tests available for the first time on a rheometer platform, streamlining robust rheology testing. It is supported by market-leading application expertise that is strengthened by a detailed understanding of how rheology interfaces with and informs other important material characterization techniques.

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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.Size Exclusion ChromatographySize exclusion chromatography (SEC) is a liquid chromatographic technique used to separate and identify molecules based on their size, including polymers, proteins, nanoparticles & nucleic acid. SEC is further subdivided into gel filtration chromatography (GFC) and gel permeation chromatography (GPC) when an aqueous or organic mobile phase is used respectively. HPLC-based SEC systems and columns are available for analytical separation alongside SEC spin columns or filters to prep samples for many protocols. Find the best size exclusion chromatography equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Preparative ChromatographyPreparative chromatography equipment is used for purification purposes, separating and collecting compounds eluted from a mixture which can then be subsequently used for further purposes. This can be done in large quantities or small. Preparative chromatography systems are usually low to medium pressure liquid chromatographs that are semi-automated. Explore a range of preparative columns and fraction collectors. Find the best preparative chromatography equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity.  Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.RheometryRheometers are used to measure the rheology of fluids, which is the flow of fluids in response to an applied force. The most common types of rheometer include shear rheometers (capillary, cone and plate and rotational cylinder) and extensional rheometers. Viscometers are similar to rheometers however viscometers only measure the viscosity of a fluid.Particle CharacterizationParticle characterization instruments are used to determine particle size distribution, shape, surface area, zeta potential, density and porosity of particles and materials. Multiple tecchniques are available for determining particle size, shape and count including dynamic light scattering (DLS), laser diffraction, electrozone (Coulter technique), imaging particle analysis and single particle optical sensing. Determine the density of your material with a gas pycnometer or examine its surface area and porosity with gas adsorption analyzers and mercury porosimeters. Find the best particle characterization instruments in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.

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Exploring the Links Between Rheology, Gel Permeation Chromatography and Particle Characterization