Study Set Content:
- often an approximate measure of the amount of certain soluble constituents or group of related constituents within a crude in a certain solvent.
amount of extractive
The solvent to be employed must not
- dissolved appreciable quantities of substances other than those sought in the extraction
An efficient and complete extraction is assured if the solvent is
divided into a number of relatively small portions and used successively.
Condenser
Extractor
Mantle
Cooling water
Sample
Extractant path
Vapor path
Solvent
- is an ideal solvent for extraction of various chemicals like tannins, resins
Alcohol
Soluble extractives
Alcohol
- is used for determination of alcohol soluble extractive
95% ethyl alcohol
1. Aloes
2. Benzoin (95% alcohol)
3. Rhubarb (50% alcohol)
not more than 10.0
not less than 90.0 (Siam benzoin)
not less than 75.0 (Sumatra benzoin)
not less than 30.0
not less than 90.0
(Siam benzoin)
not less than 75.0
(Sumatra benzoin)
not less than 50.0
not less than 04.5
not more than 30.0
not less than 12.0
4. Asafoetida (90% alcohol)
5. Ginger (90% alcohol)
6. Valerian (60% alcohol)
7. Vanilla (45% alcohol)
1. Myrrh
2. Benzoin
Not more than 70.0
Not more than 24.0
- is applied to drugs of which one or more of the most important constituents are soluble in water.
determination of the water soluble extractive content
