Inverse Size Exclusion Chromatography Using Extraction Residues or Extracts of Coals as a Stationary Phase

1996 ◽  
Vol 10 (4) ◽  
pp. 1012-1016 ◽  
Author(s):  
Mitsuru Morino ◽  
Hiroyuki Kaneko ◽  
Toshimasa Takanohashi ◽  
Masashi Iino
Keyword(s):  
Stationary Phase ◽  
Size Exclusion Chromatography ◽  
Size Exclusion ◽  
Exclusion Chromatography ◽  
Inverse Size Exclusion Chromatography

scholarly journals Molar mass characterization of hydrophilic copolymers, 2 Size exclusion chromatography of cationic (meth)acrylate copolymers

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Martina Adler ◽  
Harald Pasch ◽  
Christian Meier ◽  
Raimund Senger ◽  
Hans-Günter Koban ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Size Exclusion Chromatography ◽  
Molar Mass ◽  
Extended Period ◽  
Size Exclusion ◽  
Viscosity Data ◽  
Exclusion Chromatography ◽  
Reproducible Method ◽  
Novel Method ◽  
Sec System

AbstractA robust and reproducible method for the molar mass analysis of cationic copolymers based on dimethylaminoethyl methacrylate or trimethylammonioethyl methacrylate and different (meth)acrylates has been developed. Size exclusion chromatography (SEC) using a novel polyester-based packing as the stationary phase and dimethylacetamide (DMAC) as the mobile phase yields highly accurate results for copolymers with an amino comonomer content up to 50 wt.-%. To suppress the different polar and ionic interactions between sample molecules, stationary phase and eluent, DMAC was modified with LiBr and tris(hydroxymethylamino) methane (TRIS). Calibrating the SEC system with poly(methyl methacrylate) of narrow polydispersity, molar masses were obtained that are in good agreement with viscosity data. Reproducibility and robustness of the novel method were proven by running samples for an extended period of two weeks.

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