Page 10 - Phytochemistry -1 (PG404) / Clinical Pharmacy 2nd level students ( 2019 )

Clinical pharmacy PharmD program Third level Phytochemistry-1 (PG-504)

- 2 Sulfuric acid test:

Heating sugars with conc. H 2SO 4 results in dehydration and charring with

decomposition of sugars.

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- 3 Reduction of Fehling's solution

* Positive for monosaccharide and reducing disaccharides.

* It is composed of 2 solutions mixed together just before use:-

Fehling A: CuSO₄

Fehling B: Rochell salt (potassium sodium tartarate) + KOH

* Needs hot alkaline medium.

* R ed precipitate is due to Cu 2 O ppt.

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