Page 477 - Applied Pharmacognosy

• indicates contamination with earthy matter .

C .Water – soluble ash

• In case of drugs which can be adulterated by exhaustion
with water e.g. Ginger & Liquorice

• A minimum % of water – soluble ash is demanded. (not
less than)
Determination of Water – soluble Ash

• Prepare the total ash .
• Boil the ash for 5 minutes with 25 ml of H2O and collect the

insoluble matter on an ashless filter paper.