ChemistryWhich of the following is used in a colour test of amino acid ?

Which of the following is used in a colour test of amino acid ?

  1. A

    Ninhydrin

  2. B

    Cyanogen bromide

  3. C

    Trypsin

  4. D

    Chymotrypsin

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    Solution:

    • The ninhydrin test is a chemical test which is used to check whether a given analyte contains amines or α-amino acids. 
    • In this test, ninhydrin (a chemical compound with the formula C9H6O4; IUPAC name: 2,2-dihydroxyindane-1,3-dione) is added to a test solution of the analyte. 
    • The development of a deep blue color indicates the presence of ammonia, primary/secondary amines, or amino acids in the analyte.
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