Author Topic: Alkaloid Test  (Read 4717 times)

Offline Asif.Hossain

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Alkaloid Test
« on: July 15, 2012, 10:00:13 AM »
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  • Alkaloids are a group of naturally occurring chemical compounds that contain mostly basic nitrogen atoms. This group also includes some related compounds with neutral and even weakly acidic properties. Also some synthetic compounds of similar structure are attributed to alkaloids. In addition to carbon, hydrogen and nitrogen, alkaloids may also contain oxygen, sulfur and more rarely other elements such as chlorine, bromine, and phosphorus.


    Test for alkaloids

    1. Dragendorff’s test
    1 ml of extract, add 1 ml of Dragendroff’s reagent (potassium bismuth iodide solution). An orange-red precipitate indicates the presence of alkaloids.

    2.Mayer’s test
    1 ml of extract, add 1 ml of Mayer’s reagent (potassium mercuric iodide solution). Whitish or cream colored precipitate indicates the presence of alkaloids.

    3.Hager’s test
    1 ml of extract, add 3 ml of Hager’s reagent (saturated aqueous solution of picric acid). Yellow colored precipitate indicates the presence of alkaloids

    4. Wagner’s test
    1 ml of extract, add 2 ml of Wagner’s reagent (iodine in potassium iodide). Reddish brown colored precipitate indicates the presence of alkaloids

    Test for alkaloids : Dragendorff’s test
    « Last Edit: July 15, 2012, 10:03:23 AM by Asif.Hossain »
    Muhammad Asif Hossain
    Coordination Officer
    Daffodil International University
    Cell:01811458878
    Email:asif_diu@daffodilvarsity.edu.bd

    Offline shyful

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    Re: Alkaloid Test
    « Reply #1 on: August 02, 2012, 03:47:50 PM »
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  • Excellent and Informative Post
    S.M.Shyful Hoque
     Senior Lecturer
    Department of Law
    Daffodil International University
    Email: shyful@daffodilvarsity.edu.bd

    Offline Mohammad Salek Parvez

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    Re: Alkaloid Test
    « Reply #2 on: August 08, 2012, 10:34:39 AM »
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  • Informative Post
    :SP:

     


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