enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Gel permeation chromatography - Wikipedia

   en.wikipedia.org/wiki/Gel_permeation_chromatography

   Gel permeation chromatography (GPC) [1] is a type of size-exclusion chromatography (SEC), that separates high molecular weight or colloidal analytes on the basis of size or diameter, typically in organic solvents. The technique is often used for the analysis of polymers.

3. Polymer characterization - Wikipedia

   en.wikipedia.org/wiki/Polymer_characterization

   Gel permeation chromatography is often used in combination with multi-angle light scattering (MALS), Low-angle laser light scattering (LALLS) and/or viscometry for an absolute determination (i.e., independent of the chromatographic separation details) of the molecular weight distribution as well as the branching ratio and degree of long chain ...

4. Size-exclusion chromatography - Wikipedia

   en.wikipedia.org/wiki/Size-exclusion_chromatography

   There were also attempts to fractionate synthetic high polymers; however, it was not until 1964, when J. C. Moore of the Dow Chemical Company published his work on the preparation of gel permeation chromatography (GPC) columns based on cross-linked polystyrene with controlled pore size, [15] that a rapid increase of research activity in this ...

5. Two-dimensional chromatography - Wikipedia

   en.wikipedia.org/wiki/Two-dimensional_chromatography

   Gas chromatography-mass spectrometry (GC-MS) is a two-dimensional chromatography technique that combines the separation technique of gas chromatography with the identification technique of mass spectrometry. GC-MS is the single most important analytical tool for the analysis of volatile and semi-volatile organic compounds in complex mixtures. [7]

6. High-performance liquid chromatography - Wikipedia

   en.wikipedia.org/wiki/High-performance_liquid...

   Gel permeation chromatography (GPC)—separation of synthetic polymers (aqueous or organic soluble). GPC is a powerful technique for polymer characterization using primarily organic solvents. Gel filtration chromatography (GFC)—separation of water-soluble biopolymers. GFC uses primarily aqueous solvents (typically for aqueous soluble ...

7. Chromatography - Wikipedia

   en.wikipedia.org/wiki/Chromatography

   Size-exclusion chromatography (SEC) is also known as gel permeation chromatography (GPC) or gel filtration chromatography and separates molecules according to their size (or more accurately according to their hydrodynamic diameter or hydrodynamic volume). Smaller molecules are able to enter the pores of the media and, therefore, molecules are ...

8. Membrane technology - Wikipedia

   en.wikipedia.org/wiki/Membrane_technology

   The rejection can be determined in various ways and provides an indirect measurement of the pore size. One possibility is the filtration of macromolecules (often dextran, polyethylene glycol or albumin), another is measurement of the cut-off by gel permeation chromatography. These methods are used mainly to measure membranes for ultrafiltration ...

9. OECD Guidelines for the Testing of Chemicals - Wikipedia

   en.wikipedia.org/wiki/OECD_Guidelines_for_the...

   Determination of the Low Molecular Weight Content of a Polymer Using Gel Permeation Chromatography 120: Solution/Extraction Behaviour of Polymers in Water 121: Estimation of the adsorption coefficient (K OC) on Soil and on sewage sludge using High Performance Liquid Chromatography (HPLC) 122: Determination of pH, Acidity and Alkalinity: 123