Place 1 mL of sodium bisulfite reagent in a test tube and add 0.3 mL or 300 mg of unknown. Stopper the test tube and shake vigorously.
Sodium bisulfite reagent: Add 1 mL of ethanol to 4 mL of a 40% aqueous solution of sodium bisulfite. Decant or filter the solution prior to use.
Formation of a precipitate is a positive test.
Aryl methyl ketones form the precipitate slowly or not at all.
Addition complex stable only in neutral solution.
| |
| |