This document discusses churnas, which are fine herbal powders used in Ayurvedic medicine. It describes how churnas are prepared by cleaning, drying, pulverizing and sieving herbs. Parameters for standardizing churnas include authentication of plant parts, morphology, microscopy, chemical composition, physical properties, and biological factors. Examples of evaluating physical parameters like pH, moisture content, and ash value are provided. Common uses of churnas include as carminatives, diuretics, laxatives, and for conditions like diarrhea. Some example churna formulations are listed.

1. Submitted to -: Mohit Mangla
Submitted by-: Navneet Singh
Bpharm 4rd sem
1438002

2. Index
 Churnas
 Preparation of churnas
 Parameter used for standardization of churnas
 Evaluation of physical parameter of churnas
 Uses of churnas
 Example of churnas

3. Churnas
 Churna is defined as a fine powder of drug or drugs
in Ayurvedic system of medicine. Drugs mentioned
in patha, are cleaned properly, dried thoroughly,
pulverized and then sieved. The churna is free
flowing and retains its potency for one year, if
preserved in an airtight container.

4. Preparation of churnas
 Drug mentioned in yoga are cleaned and dried
properly they are finally powdered and sieved. If
more then one drug are present then each one is
separately powdered, sieved and weight accurately
and then mixed together.

5. Parameter used for
standardization of herbal
churnas
Method Evaluation of parameter
Authentication Parts of plants like leaf, flower,
root,stolon
Family , biological source
Morphology or organoleptic
evaluation
Odour, taste, size, shape, special
feature
Microscopy evaluation Leaf content, trichomes, stomata,
quantitative microscopy
Chemical evaluation Chemical test, chemical assay,
phytochemical assay
Physical evaluation pH, moisture content, ash value,
melting point, crude fibre content etc
Biological evaluation Microbial content, pesticide
contamination

6. Evaluation of physical
parameter of churnas
S.no Physical parameter values
1 pH 5.35
2 Moisture content 10.8% ww
3 Crude fibre content 9.75% w/w
4 Ash value
(1) Total ash content
(2) Acid insoluble ash
10% w/w
5% w/w
5 Extractive value
(1) Water soluble
extractive value
(2) Alcohol soluble
extractive value
0.12% w/w
2% w/w

7. Uses of churnas
 Carminative and stimulant
 Diuretic
 Laxative and expectorant
 Diarrhoea
 Alternative tonic
 Detoxifier
 vomiting

8. Example of churnas
Bahera, amla, harde
Dalchini, pipal,
Ela,bansholan

9. Senna leaves, black salt,
ajwain, harde
Ela, cinnamon, coriander,
black salt , nagakesar