EXPERIMENT NO. 10. DETERMINATION OF WATER SOLUBLE ASH VALUE FOR GIVEN CRUDE DRUG SAMPLE.

 PHARMACOGNOSY AND PHYTOCHEMISTRY – I PRACTICAL

EXPERIMENT NO.10

Aim: Determination of water-soluble ash value for given crude drug sample.

Reference: 1. Mayur R. Bhurat, Md. Rageeb Md. Usman, Sanjay A. Nagdev, Practical Pharmacognosy & Phytochemistry – I, Published by S. Vikas And Company (Medical Publisher) page. No.60, 61.

2. Dr. K.R Khandelwal, Textbook of Practical Pharmacognosy, Pubished by Nirali Prakashan, Sixth Edition, page. No. 23.10.

Requirements:

Apparatus: Forceps, Platinum or Silica crucible with lid, Ash less filter paper, etc.

Chemicals: Crude drug sample, water, etc.

Instrument: Muffle Furnace, Digital balance, Desiccator, etc.

Procedure:                                 

Proceed as per the steps mentioned in the procedure for determination of total ash value of a crude drug. Further

The total ash obtained was boiled with 25 ml of water for 5 minutes. The insoluble matter was collected on an ash less filter paper, washed with hot water and ignited for 15 minutes at a temperature not exceeding 450° C. The weight of insoluble matter was subtracted from the weight of total ash. The difference in weight represents the water-soluble ash. The percentage of water-soluble ash was calculated with reference to the air-dried drug.

 

RESULT: The Water soluble Ash Value of given crude drug sample was calculated and found to be…………….