Physicochemical Measurements: Gas Chromatography

Interaction Parameters of Surfactant Mixtures by Inverse Gas Chromatography

“…Inlet pressures were measured with a micrometry syringe (trough the injector septum) which was connected to an open branch mercury manometer. To ensure that the results were independent of sample size and flow rate and those measurements were being made at infinite dilution the usual checks were made (Conder & Young, 1978). Solutes were injected with 10 μl Hamilton syringes, as steam in equilibrium with pure liquid.…”

Study of the transition phenomena of poly(α-n-propyl) methacrylates adsorbed on silica by Inverse Gas Chromatography (IGC)

“…IGC technique was used, for thirty years, to characterise glass transitions of polymers [5]. We applied this technique in order to determine the change, as a function of température, of the properties of some polymers and to study the second order transitions of such polymers adsorbed on oxides.…”

“…Vn Dc (tR-to) (1) where tR is the retention time of the probe, to the zero retention reference time measured with a non adsorbing probe such as methane, De the corrected flow rate and j a correction factor taking into account the compression of the gas [5]. De and j are respectively given by the following expressions :…”

Étude par chromatographie gazeuse inverse (CGI) des propriétés acido-basiques des matériaux textiles en verre

“…La chromatographie en phase gazeuse [2,3] est une méthode de séparation des gaz et des composés susceptibles d'être vaporisés à une température appropriée. Parmi les différents types de chromatographie en phase gazeuse, nous nous intéressons à la chromatographie GadSolide d'adsorption.…”