Evaporation using a rotary evaporator (still condensation). This is about it, it can be helped by adding a small volume of ethanol at the end, as there is an issue with getting total elimination of TFA without lactonisation notably of uronic acids.

Thank you very much Catherine M G C Renard . Instead of ethanol can I use methanol and evaporate TFA completely from my sample?

Yes it will also work, acetone too if I remember correctly

Thank you Catherine M G C Renard