Digitale Bibliotheek
Sluiten Bladeren door artikelen uit een tijdschrift
 
<< vorige    volgende >>
     Tijdschrift beschrijving
       Alle jaargangen van het bijbehorende tijdschrift
         Alle afleveringen van het bijbehorende jaargang
           Alle artikelen van de bijbehorende aflevering
                                       Details van artikel 3 van 10 gevonden artikelen
 
 
  Dielectric and Chromatographic Characterization of Polyethylene Glycols as Stationary Phases
 
 
Titel: Dielectric and Chromatographic Characterization of Polyethylene Glycols as Stationary Phases
Auteur: El-naggar, A. Y.
Turky, G.
Verschenen in: International journal of polymeric materials
Paginering: Jaargang 50 (2001) nr. 2 pagina's 129-140
Jaar: 2001-08-01
Inhoud: Three types of polyethylene glycols of different molecular weights namely, 600, 4000 and 20000, were evaluated as liquid stationary phases in gas liquid chromatography. Thus, the retention mechanism for the studied polymer stationary phases, 15% by weight on chromosorb PAW and their thermodynamic parameters have been investigated via inverse gas chromatography. The effect of polymer molecular weight on their efficiency as liquid stationary phases for the gas chromatographic separation of different types of hydrocarbons is also studied. The dielectric constant of dilute solutions for the studied polymers as dissolved in solvent chloroform was studied corresponding to their polarities. Two different modes of clusters were determined due to the solute-solute and solute-solvent interaction through hydrogen bonds. All studied polymers have higher performance for separation of cyclic and aromatic compounds. Good chromatographic separation of n-alcohols is obtained toward polyethylene glycol (PEG20000) of relatively higher molecular weight. The saturated hydrocarbons can be separated very efficiently using low molecular weight polyethylene glycol (PEG600).
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details van artikel 3 van 10 gevonden artikelen
 
<< vorige    volgende >>
 
 Koninklijke Bibliotheek - Nationale Bibliotheek van Nederland