This is a quite useful method to generate the bisulfite-adduct from impure aldehydes or ketones.
Dissolve the impure carbonyl compound in a equal volume of toluene or DCM and add 1-5 mol% PTC (my choice is aliquat 336). To this solution add 1.5-2 molar equivalents sodium bisulfite [1] as a 25% aqueous solution and stir the crap out of the mixture for 30 minutes at room temp [2]. Filter off the precipitated bisulfite-adduct and continue the stirring for another 30 minutes. Repeat until no more adduct precipitates out. Rinse the adduct once with 70% IPA to remove any remaining toluene. The yields are close to quantitative.
[1] Carbonyl compounds can be scarce and very expensive while sodium bisulfite is cheap. To get high yields of the adduct use excess of bisulfite.
[2] If the precipitation doesn't start within 30 minutes at room temp, heat the mixture to 50-60°C and continue the stirring.
Edit: It looks like this method has been patented already.
Patent US4162269