Plant Extracts: 2600 in stock. 9000
available for collection
Our database contains plants
collected from various regions of the
former USSR with about 2600 available
from stock for extraction. Extracts
can be prepared on a large scale and
fractionated. Active plant component
identification is also possible.
Price - depends on the collection
region, amount of extract, number of
extracts from one sample, solvents
used for extraction and procedure.
Please contact us for current prices.
Delivery time – normally 5-6
months if the product is not in stock
and collection is necessary. The
collection season starts in April and
ends in October.
2600
plants in stock
View
2600 plants available from stock. By
first letter: A
- C - D
- L - M
- R - S
- Z 9000 plants available for
collection
Download
all plant list available from stock
and for collection. How Plant Extracts are Collected
The collected plant material (plant
parts: stems, leaves, flowers, roots,
bark etc.) is dried in a ventilated
oven at 45 oC for 24 H, and
subsequently milled to a fine powder
by means of an IKA Universal Mixer M20
(or other type). An amount of 20.0 g
of the dried plant powder is weighed
in an Erlenmeyer of 100 ml to which 70
ml of hexane (purity grade 99 %) is
added (the plant sample has to be
submerged with solvent) for
pre-extraction. The Erlenmeyer is
placed in a sonicator-bath (Branson
8210 or some other type) and sonicated
at a temperature 40 oC during 30
minutes. The mixture is filtered using
paper filter, followed by washing the
Erlenmeyer with 20 ml of hexane and
then with 50 ml of hexane. The
filtrate is poured in a round-bottomed
flask and the solvent is concentrated
in vacuo (at about 11 mm Hg) up to
5-10 ml by means of rotavapor,
utilizing a water bath at 40 oC. This
residue is brought in a 30-ml vessel
to let the solvent evaporate. The open
vessel is left overnight in a
well-ventilated hood in order to
evaporate the last traces of the
solvent in the hexane pre-extract. The
solids, collected on the filter, are
broken up and dried in the air
overnight in the hood. The dried
material is extracted in the same way
with methanol-water (90:10). The dried
material from the filters placed in an
Erlenmeyer of 100 ml to which 70 ml of
90 % methanol is added. The mixture is
sonicated as above at 40C during 30
minutes, after which it is filtered,
followed by washing the Erlenmeyer
with 20 ml of 90 % methanol. The
filtrate is poured in a round-bottomed
flask and the solvent is evaporated in
vacuo completely. The dry 90% methanol
extract is dissolved in as little as
possible 100 % methanol by using the
sonicator-bath and poured in a 30-ml
vessel to let it evaporate overnight
in the hood.
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Plant Extracts