CHARACTERIZATION OF SOME NEW POLYSILOXANE STATIONARY PHASES BY PRINCIPAL COMPONENT ANALYSIS

In this study, several new stationary phases were characterized by pri ncipal component analysis. Fourteen new stationary phases, including s ubstituted phenyl and oligoethyleneoxide functionalities on polysiloxa ne polymers, were tested and compared to three well known stationary p hases. The main features of these phases were studied using a series o f test solutes of varying chemical characteristics representing the da ta set for principal component analysis. Two principal compounds were found to account for 99.20 % of the variance (the first accounted for 94.96 % and the second for 4.24 %). The data were represented as a two -dimensional map for visual representation of the characteristics of t hese stationary phases. The first principal component represented a se lectivity based on polarity (r(2) = 0.998), while the second showed Le wis acid-base characteristics of the phases. Polarizable and amphoteri c characteristics of these phases also became evident using this evalu ation method.