Isothermal retention indices on poly(3,3,3-trifluoropropylmethylsiloxane) stationary phases.
Isothermal retention indices (I) of 56 solutes of varied chemical nature and polarity were determined by a well-proven accurate method on poly(3,3,3-trifluoropropylmethylsiloxanes) with trifluoropropyl group percentages between 0 and 50% within the 353-413 K temperature range. The column temperature effect on the retention index for a representative set of solutes was studied. The linear model and the recent expression I = a + bT(-1) + c ln T were discussed. The retention index dependence on the polymer polarity was also investigated. Principal component analysis and multiple linear regression (MLR) were applied to obtain retention models relating the I values to physicochemical and molecular properties of the solutes chromatographed. The best model of prediction of the retention in these fluorinated stationary phases was obtained by using the Abraham's descriptors.
Lebrón-Aguilar
Rosa
R
Department of Structure and Molecular Dynamics, Institute of Physical Chemistry Rocasolano (CSIC), Serrano 119, 28006 Madrid, Spain.
Quintanilla-López
Jesús Eduardo
JE
Tello
Ana María
AM
Santiuste
José María
JM
D000327:Adsorption; D008956:Models, Chemical; D011108:Polymers; D025341:Principal Component Analysis; D012044:Regression Analysis; D012827:Silicone Oils / Q000737:chemistry*; D013696:Temperature
D011108:Polymers; D012827:Silicone Oils; C054077:fluorosilicone oil