"GENERAL CHEMICAL TESTS FOR ALKALOIDS"

Alkaloids are tested by the following reagents. Each reagent or test has accuracy and specificity.

1. Dragendroff's reagent
👉 This reagent is constituted of Potassium Bismuth lodide (PBI). Alkaloids give reddish brown color with the dragendroff's reagent.

2. Mayer's reagent:-
👉 This reagent is constituted of Potassium Mercuric lodide (PMI). Alkaloids give cream color with the Mayer's reagent. Remember M for Mayer M for Mercuric.

3. Wagner's reagent:-
👉 This reagent is constituted of lodine potassium lodide (IP). Alkaloids give reddish brown precipitate with the Wagner's reagent.

4.Hager's reagent :-
👉This reagent is constitutes of Picric Acid. Alkaloids give yellow precipitate with the Hager's reagent.

5. Tannic acid :-
👉With tannic acid alkaloids give buff colored precipitate.

6. Picrolinic acid :-
👉Yellow colored precipitate are produced with picrolinic acid.