Pharmacopoeia Articles
Collected all the year round, freed of wood remains, cut into pieces and
dried fruitless sclerotia of birch fungus (Inonotus obliquus (Pers.) Pil.)
of the family Hymenochaetaceae.
Appearance Indications
Solid Stock.
Pieces of different forms the size of up to 10cm. Outer layer of the sclerotia
is black, heavily cracked, while the inner layer is dark-brown with small,
yellow veins, the number of which is increasing in the direction of the inner
side. Fungus tissue is solid and hard. There is no odor. The taste is bitterish.
Organoleptic
The color is dark-brown. No odor. The taste is bitterish.
Numerical Indicators
Solid Stock.
Chromogenous complex: not less than 10%; moisture content: not more than 14%;
total ash content: not more than 14%; organic admixtures, bast, wood remains,
including those separated during analysis: not more than 1%.
Mill Stock.
Chromogenous complex: not less than 10%; moisture content: not more than 14%;
total ash content.
Quantitative Determination
A stock analytical sample should be pulverized down to the size of particles
passing through a 2mm sieve. 10 grams of mill stock should be put into a 500ml
flask, then add 300ml of water and leave it for 1 hour at room temperature. Then
the flask should be connected with a reflux condenser and boil on an electric
heater maintaining quiet boiling for 2 hours. After that, water extract should
be filtered through a paper filter into a 500ml measuring flask, the stock
should be transferred to the filter and rinsed with warm water. Water extract in
the flask should cooled down to 18-20°C, then the volume of extract should be
brought to the mark and thoroughly mixed.
25ml of filtrate should be transferred to a weighed china cup, then evaporate on
a water bath to dryness and dry at 100-105°C for 3 hours, then cool I and
quickly weigh it to determine the mass of dry residue (m1).
To determine the chromogenous complex, 100ml of filtrate is put into a 150ml
glass, then acidified by 25% solution of hydrochloric acid (0.5-0.8ml) up to pH
1.0-2.0 with a general-purpose, indicator paper, then mix and leave for 30
minutes. After the occurrence of dark-brown precipitate, the glass contents are
filtered through a paper folded filter.
25ml of filtrate, received after the deposition of chromogenous complex by
hydrochloric acid, is transferred into a constant-mass dried and weighed china
cup, evaporate on water bath to dryness and dry at 100-105°C for 3 hours, then
cool and quickly weigh to determine the mass of dry residue (m2).
Chromogenous complex contents on a percentage basis (X) in terms of
absolutely dry stock should be computed from the formula:
(m1
- m2) · 500 · 100 · 100
X =
------------------------------------------
m
· 25 · (100 - W)
| where: |
- m1
- - Dry residue mass prior to deposition by hydrochloric acid in
grams;
- m2
- - Dry residue mass after deposition by hydrochloric acid in grams;
- m
- - Stock mass in grams;
- W
- - Mass loss during stock drying in percentage terms.
|
Packing
Solid stock is packed into fabric or flax-jute-hemp bags of not more than 15kg
net weight.
Mill stock is packed by 200 grams into Type II paper bags with subsequent
putting into cartons 12-1-4.
Shelf Life:
2 years.
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KeyHerbs.com
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