Effect of various substances on the colorimetric amino acid-ninhydrin reaction.
The effect of salts, acids, alkali, and buffer solutions on the color development of the Cd-ninhydrin-amino acid reaction has been investigated. Of the salt solutions examined only Cu2+ and Fe3+ interfered with the color yield. Very low concentrations of these ions were sufficient to drastically inhibit color development.
D000596:Amino Acids / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D002712:Chlorides; D003124:Colorimetry; D003300:Copper; D019327:Copper Sulfate; D005290:Ferric Compounds; D007192:Indenes / Q000032:analysis*; D009555:Ninhydrin / Q000032:analysis*
D000596:Amino Acids; D002712:Chlorides; D005290:Ferric Compounds; D007192:Indenes; D003300:Copper; D009555:Ninhydrin; D019327:Copper Sulfate; C024555:ferric chloride