Areca
Arecae Semen
Areca
is the seed of Areca catechu Linné
(Palmae).
Description:
Rounded-conical
or flattened nearly spherical seed 1.5-3.5 cm high and 1.5-3 cm in diameter;
hilum at the center of its base and usually forming a dent; externally grayish
red-brown to grayish yellow-brown, with a network of pale lines; hard in
texture; cross section dense in texture, exhibiting a marbly appearance of
grayish brown seed coat alternating with white albumen; center of the seed
often hollow.
Odor,
slight; taste, astringent and slightly bitter.
Identification:
Weigh
3 g of pulverized Areca in a glass stoppered centrifuge tube, and add 30 mL of
diethyl ether and 5 mL of sodium hydroxide TS, stopper tightly, shake for 5
minutes, centrifuge, and separate the diethyl ether layer. Evaporate the
diethyl ether on a water bath, dissolve the residue in 1.5 mL of methanol,
filter, and use the filtrate as the sample solution. Separately, dissolve 5 mg
of arecoline hydrobromide for thin-layer chromatography in 1 mL of methanol,
and use this solution as the standard solution. Perform the test with these
solutions as directed under Thin-layer chromatography. Spot 5 μL each of the
sample solution and standard solution on a plate of silica gel for thin-layer
chromatography. Develop the plate with a mixture of acetone, water and acetic
acid (100) (10:6:1) to a distance of about 10 cm, and air-dry the plate. Spray
evenly iodine TS on the plate: one spot among the spots from the sample solution
and a red-brown spot from the standard solution show the same color tone and
the same Rf value.
Purity:
(1)
Pericarp-When perform the test of foreign matter, the amount of pericarp
contained in Areca is not more than 2.0z.
(2) Foreign matter -The amount of foreign
matter other than the pericarp contained in Areca does not exceed 1.0z.
Total ash:
Not
more than 2.5z.
Containers and storage:
Containers-Well-closed
containers.
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