PROGRAMMED-TEMPERATURE GAS-CHROMATOGRAPHY - COMPARATIVE-STUDY OF RETENTION TEMPERATURES ON 4 UNEQUALLY POLAR STATIONARY PHASES

Retention temperatures (T(R)) of a series of solutes on four packed columns coated with OV-105, PS-255, di-n-decyl phthalate and OV-275 were measured at different programming rates and compared with other T(R) values calculated by some current equations. confirming that the equations of Curvers et al., Krupcik et al. and Akporhonor et al. predict the retention temperatures closest to the observed T(R) values. Programmed-temperature retention indices (PTRIs) calculated by cubic splines interpolation of both the experimental and some other calculated T(R) values were also compared, taking the former as standard. the resulting PTRI values differing by only 2% for at least 90% of the solutes on the tow-polarity stationary phases.