Page 47 - final Practical handout PG 303-Cogno-2- 2024-2025

Liquorice Rhubarb Jalap ro
‫ة‬L‫ب‬e‫جل‬ve‫ال‬l ‫ة‬2‫ن‬
‫ عرق سوس‬Clinical Pharm D ‫الراوند‬

Picture

Macroscopical • Cylindrical pieces. • Rectangular pieces • The jalap roo
characters • Very sweet taste.
(barrel). spindle shap
• Fracture:
- fibrous in bark, • Bitter with slight • Outer surface
-splintery in wood.
astringent taste. lenticels, fur
Chemical tests ✓ With 1-2 drops of
66% H₂SO₄ • Gritty under teeth?? and wrinkles
orange red color
• Colors saliva yellow • Smoky odor
✓ With water
voluminous froth • fracture: granular • Bitter acrid

✓ With Fehling resin), sweet
reagent on W. B
sugars) taste.
red ppt. due to
reducing sugars. ✓Micro sublimation:

powdered Rhubarb

gives a yellow needle

shaped sublimate

which dissolves in

KOH give red color.
✓Borntrager’s test:

Shake powder with

ether, take ether layer
with aq. NH₄OH

gives red color.

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