This is an example in a Princetown Review prep book. I am not understanding the statement "his separation was only partial (because two different peaks are recorded)." This is implying that Compounds A and B did not separate, but um... there were two peaks? Doesn't that imply that it was separated?
Unless there is a solvent peak? But I did a lot of Googling, and didn't find any indication that there should be a solvent peak under normal circumstances.
Why did the example say that the 2 compounds weren't separated despite the fact that there are 2 peaks?