[Investigation on the changing regularity of the relationship between retention index and temperature of the GDX series stationary phases].
A systematical measure of the polarity scale of the Chinese porous polymer beads of this series of stationary phase has been carried out, including the McReynolds constant at 120 degrees C by using squalane as non-polar stationary phase and the relative constant to GDX-103 at 180 degrees C. Based on the above work, two kinds stationary phases GDX-101 and GDX-103 were selected, on which the changing regularity of the relationship between retention index and temperature of the five "probes" of stationary polarity determination, including benzene, butanol, 1-nitropropane, 2-pentanone and pyridine were investigated. At the same time, the changing regularity with temperature of the relative McReynolds constant delta I of GDX-101 to GDX-103 was studied. It is found that Ip-theta c curve and delta I-theta c curve all showed a turning point at the temperature of 180 degrees C and that there was a maximum value of delta I at the temperature of 180 degrees C. So we think that the retention mechanism of this kind of stationary phase changed at 180 degrees C.
Cui
Y C
YC
Chemistry Department of Kunming Teacher's College, Kunming 650031, China.
Zhang
C C
CC
Wang
Z
Z
Hong
P J
PJ
D020001:1-Butanol / Q000032:analysis*; D001554:Benzene / Q000032:analysis; D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods; D009595:Nitroparaffins / Q000032:analysis; D011407:Propane / Q000031:analogs & derivatives* / Q000032:analysis; D011725:Pyridines / Q000032:analysis*; D013696:Temperature
D009595:Nitroparaffins; D011725:Pyridines; C035314:1-nitropropane; D020001:1-Butanol; D001554:Benzene; C023666:pyridine; D011407:Propane