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Topic: Gel permeation chromatography


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In the News (Sun 6 Dec 09)

  
  GPC
While GPC has its greatest value for measuring the molecular weight and polydispersity of synthetic polymers, a closely related method, high-performance liquid chromatography, HPLC, is more useful for polymers containing functional groups, such as proteins and pharmaceutical polymers containing special active groups.
By contrast, HPLC utilizes interactions and weak bonding between the polymers and the surface of the particles composing the stationary phase(6).
Important parts of GPC instrumentation include pumps for maintaining constant, pulseless rates of flow, column types for the molecular weight range of interest, and the detector system for quantifying the result.
www.polyacs.org /nomcl/pmse.gpc.html   (940 words)

  
  Encyclopedia: Gel permeation chromatography
Gel permeation chromatography (GPC) also known as size exclusion chromatography (SEC) is a chromatographic method in which molecules are separated based on their size.
In fiber-optic communications, a gel resembling petroleum jelly in viscosity is used to surround a fiber, or multiple fibers, enclosed in a loose buffer tube.
Chromatography is a separation method that exploits the differences in partitioning behavior between a mobile phase and a stationary phase to separate the components in a mixture.
www.nationmaster.com /encyclopedia/Gel-permeation-chromatography   (807 words)

  
 ipedia.com: Gel permeation chromatography Article   (Site not responding. Last check: 2007-10-03)
In chemistry, Gel Permeation Chromatography also known as Size Exclusion Chromatography is a chromatographic method in which molecules are separated based on their size.
In chemistry, Gel Permeation Chromatography (GPC) also known as Size Exclusion Chromatography (SEC) is a chromatographic method in which molecules are separated based on their size.
Therefore GPC is an old terminology and can only be used when you are over the age of 60.
www.ipedia.com /gel_permeation_chromatography.html   (642 words)

  
 Learn more about Polymer in the online encyclopedia.   (Site not responding. Last check: 2007-10-03)
Techniques such as wide angle xray scattering, small angle xray scattering, and small angle neutron scattering are used to determine the crystalline structure of polymers.
Gel permeation chromatography is used to determine the number average molecular weight, weight average molecular weight, and polydispersity.
Thermal properties such as the glass transition temperature and melting point can be determined by differential scanning calorimetry and Dynamic Mechanical Analysis.
www.onlineencyclopedia.org /p/po/polymer.html   (1122 words)

  
 JCE DLib: JCE WebWare: Collection: Reviewed: Principles of Gel Permeation Chromatography
Principles of Gel Permeation Chromatography presents the principles of gel permeation chromatography (GPC) for students in introductory undergraduate courses of chemistry and biochemistry.
The basic elements of column chromatography, emphasizing the stationary and mobile phases, are presented in the Introduction, followed by a sequence of pictures and texts describing major steps in GPC analysis in the Real Lab section.
Three samples are available for a virtual GPC experiment: sample 1, containing hemoglobin; sample 2, containing methylene blue; and sample 3, containing both methylene blue and hemoglobin.
jchemed.chem.wisc.edu /JCEDLib/WebWare/collection/reviewed/JCE2006p1567_2WW   (582 words)

  
 Viscotek - Gel Permeation Chromatography - Light Scattering
Viscotek is the global leader in Gel Permeation Chromatography (GPC) / Size Exclusion Chromatography (SEC) detectors, software and systems for the characterization of natural and synthetic polymers, copolymers, proteins, protein conjugates, aggregates and excipients.
In a single experiment, our unique and patented static light scattering, dynamic light scattering, viscometer, triple detector and tetra detector technologies allow you to obtain absolute molecular weight, molecular size, intrinsic viscosity, conformation, structure, branching, aggregation and copolymer composition.
Whether your application is Gel Permeation Chromatography (GPC), Flow Injection Polymer Analysis (FIPA), Dilute Solution Viscosity (DSV) or Dynamic Light Scattering (DLS) for R&D, Analytical, QA/QC or Process Control, Viscotek has the instrumentation, technical service and analytical support to meet your needs.
www.viscotek.com   (168 words)

  
 biology - Gel filtration chromatography   (Site not responding. Last check: 2007-10-03)
Gel filtration chromatography is a laboratory technique to separate biomolecules by size.
This means that the first fraction collected will have the largest molecules, and later fractions will have smaller ones.
This is not to be confused with gel electrophoresis where smaller molecules travel faster than larger ones.
www.biologydaily.com /biology/Gel_filtration_chromatography   (129 words)

  
 Size Exclusion/Gel Permeation Chromatography software
Now there is a full-featured Size Exclusion Chromatography software package that is fully integrated with Chrom Perfect® for Windows.
The software will detect the peaks in the SEC chromatogram, and provide molecular weight summations for each peak.
Justice Laboratory Software supply Chromatography data systems and chromatography software for HPLC, GC and other chromatography applications
www.chromperfect.com /SEC_GPC.htm   (348 words)

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