Question

Why methanol is a good solvent for UV and not for IR determination?

Answer 1

Answer:

EtOH is a good solvent for both polar and non polar compunds. For the UV-VIS, you do need to have a homogenous solution as it is not a sensitive method. Therefore, the solubility is important. Most of the compunds studied in UV-VIS are organic molecules and hence EtOH is used with the above mentioned details by other comments.