Colorimetric test for methanol

Will adding dilute potassium permanganate to impure methanol in alkaline conditions work as a good colorimetric method? I am planning to produce salicylic acid from methyl salicylate (by hydrolysing the ester and producing methanol), and was wondering how I can show that the reaction goes to completion under alkaline conditions. If not, what would be a good method to show this?


