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By
Mrs. Poonam N. Chougule
Assistant Professor and HOD of Pharmacognosy
department
AMCP, Peth- Vadgaon.
 Materials Required- Any vegetable drug extract,
flat- bottomed dish, oven, desiccators,
diphosphorous pentoxide, anhydrous silica gel.
 Principle:
The percentage of moisture content (loss on
drying) reflects on quality and care taken in
processing the extract of a herbal drug. The value
should be kept as low as possible to ensure quality
of the extract.
1. Weigh rapidly 0.5gm of the finely powdered
extract in a flat- bottomed dish (diameter –
50mm and height – 30mm).
2. Dry in the oven at 100- 105ᵒ C for 3 hours.
3. Cool in a desiccator over diphosphorus
pentoxide or anhydrous silica gel.
4. Calculate the percentage of the moisture
content (loss on drying) in mg per gm of air
dried sample.
 The moisture content (Loss on drying) of the
given crude drug was found to be:
HDT Practical Exp. 4

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HDT Practical Exp. 4

  • 1. By Mrs. Poonam N. Chougule Assistant Professor and HOD of Pharmacognosy department AMCP, Peth- Vadgaon.
  • 2.  Materials Required- Any vegetable drug extract, flat- bottomed dish, oven, desiccators, diphosphorous pentoxide, anhydrous silica gel.  Principle: The percentage of moisture content (loss on drying) reflects on quality and care taken in processing the extract of a herbal drug. The value should be kept as low as possible to ensure quality of the extract.
  • 3. 1. Weigh rapidly 0.5gm of the finely powdered extract in a flat- bottomed dish (diameter – 50mm and height – 30mm). 2. Dry in the oven at 100- 105ᵒ C for 3 hours. 3. Cool in a desiccator over diphosphorus pentoxide or anhydrous silica gel. 4. Calculate the percentage of the moisture content (loss on drying) in mg per gm of air dried sample.
  • 4.  The moisture content (Loss on drying) of the given crude drug was found to be: