Question

Besides transfering, what are some sources of product loss during reflux, using a rotovap, and recrystallization?

Answer 1

As you said the main source of error or loss of product during both of this method is transferring but along with it there is a different source odf loss in both of this method

No matter how less the temperature is there will be slight solubility of the sample to be determined in the solvents used for this method .

If special care is not taken and ice cold water is not used for the recrystallization of the product the product to be recrystallized becomes soluble in solvent and hence we get very minimum or no yield .

Same is the case for rotavap .

So these unwanted solubility in the solvent even at low temperature is major source of error besides transferring .

I hope this helps if you have any query or want more detailed explanation feel free to ask in the comment section below.