IPS1: Pharmacognosy - Part 2.1 - Test For Carbohydrates

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Last updated 12:28 PM on 8/23/26
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9 Terms

1
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Molisch test

General test for carbohydrates

a-Napthol

Purple/Red

2
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Fehling's test

Test for: Reducing sugars

A-CuSO4

B-K Na Tartrate

Brick red ⬇️

3
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Benedict's test

Test for: Reducing sugars

NaOH + CuSO4

Brick red ⬇️

4
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Barfoed's Test

Test for: Reducing sugars (monosaccharides)

Cupric Acetate + Acetic acid

Brick red ⬇️

5
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Tollen's Test

Test for: Reducing sugars (Aldehydes)

Silver + Ammonia

Silver mirror

6
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Picric acid Test

Test for: Reducing sugar

Reagent: Picric acid

Positive result: Mahogany red

7
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Osazone or Kowarsky

Test for: Mannose

Phenylhydrazine

Ozone: Yellow ⬇️

8
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Seliwanoff's

Test for: Ketohexose (fructose)

Resorcinol

Red

9
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Keller-Killiani Test

Test for: Deoxysugars (Cardiac glycoside)

Sulfuric acid, Acetic acid, Fe Chloride

Reddish brown