3) Using the table below, predict the elution order of benzene, butanol, 1-nitropropane, heptane,
octa ne, and decane using the following stationary phases.
a. (diphenyl)$_{0.05}$ (dimethyl)$_{0.95}$ polysiloxane
b. (cyanopropylphenyl)$_{0.14}$ (dimethyl)$_{0.86}$ polysiloxane
c. 1,5-di(2,3-demethylimidazolium) pentane bis(trifluoromethane sulfonyl)imide
Retention index
OH
Benzene
Butanol
2-Pentanone
NO$_2$
1-Nitropropane
Phase
b.p. 80°C
b.p. 117°C
b.p. 102°C
b.p. 132°C
Poly(dimethylsiloxane)
651
651
667
705
(Diphenyl)$_{0.05}$ (dimethyl)$_{0.95}$-
667
667
689
743
polysiloxane
(Diphenyl)$_{0.35}$ (dimethyl)$_{0.65}$-
746
733
773
867
polysiloxane
(Cyanopropylphenyl)$_{0.14}$-
721
778
784
881
(dimethyl)$_{0.86}$ polysiloxane
(Diphenyl)$_{0.65}$ (dimethyl)$_{0.35}$-
794
779
825
938
polysiloxane
Poly(ethylene glycol)
963
1 158
998
1 230
1,5-Di(2,3-dimethylimidazolium)
pentane bis(trifluoromethane
sulfonyl)imide (SP-IL 111)
1 400
1 567
1 585
1 834