Ninhydrin test: ( Triketo Hydrindene Hydrate) Both free and combined α-amino acids give Ninhydrin test. Significances: Ninhydrin test is used for the detection of amino acids in a solution. Ninhydrin When reacts with ammonia forms a dark blue or purple colour known as Ruhemann’s purple. So amino acid detection a solution mainly occurs  by performing ninhydrin … [Read more...]