PCOG LAB - Experiment 11 (Chemical Tests of Alkaloids)

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Last updated 7:11 AM on 8/26/26
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16 Terms

1
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1% HCl

What reagent is added to activate alkaloids?

2
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Alkaloidal Reagents

  • Chemical substances used to detect and identify alkaloids by means of producing characteristic color or precipitates

  • Usually composed of heavy metals


3
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Heavy Metals

Alkaloidal reagents are usually composed of _____

4
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Red-Orange Color

Positive Result of:

Erdmann’s Reagent

5
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Color Change

Positive Result of:

Ferric Chloride Solution

6
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Brownish to Black Color

Positive Result of:

Froehde’s Reagent

7
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Crystalline Yellow Precipitate

Positive Result of:

Hager’s Reagent

8
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White or Slightly Yellow Precipitate

Positive Result of:

Mayer’s Reagent

9
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Buff Colored Precipitate

Positive Result of:

Tannic Acid Solution

10
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White Precipitate

Positive Result of:

Valser’s Reagent

11
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Reddish-Brown Precipitate

Positive Result of:

Wagner’s Reagent

12
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Orange-Red Precipitate

Positive Result of:

Dragendorff’s Reagent

13
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White Precipitate

Positive Result of:

Marme’s Reagent

14
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Yellowish White Precipitate

Positive Result of:

Sonnenchein’s Reagent

15
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Yellowish White Precipitate

Positive Result of:

Scheibler’s Reagent

16
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Violet-Blue Color (Strychnine)

Positive Result of:

Mandelin’s Reagent