Gas Chromatography: Polar Compounds & Retention Time

[sotellme]

it says when i choose the liquid stationary phase, then i have to use the rule; "like dissolves like". i wonder if the compound i am interested in is polar, this means that the stationary phase i choose must also be polar, right? how would you predict the retention time of my compound? would it be eluted faster or slower than other nonpolar compounds?


BTW how can polar compounds be interacted with each other?

thanks again!

 

[chem_tr]

Retention time involves some interactions between solute (your compound dissolved in a solvent) and the stationary phase. The high polarity of solvent drives your spot faster if your compound is also polar; and vice versa (like dissolves like principle).

 

[sotellme]

thanks a lot!