NIS - libdoc.who.int - World Health Organization

Flos Helichrysi arenarii
General identity tests
Macroscopic and microscopic examinations, chemical analysis and thinlayer
chromatography tests for flavonoids, which are the characteristic
constituents (1, 2, 5).
Purity tests
Microbiological
Tests for specific microorganisms and microbial contamination limits are
as described in the WHO guidelines on quality control methods for medicinal
plant materials (19).
Chemical
The thin-layer chromatogram must not show an orange zone above the
brownish main zone (purity test for other Helichrysum species) (2).
Foreign organic matter
Foreign organic matter not more than 0.5%. Maximum 5% of flower
heads with long flower stalks greater than 1 cm. Not more than 5% of
broken flower heads, with a diameter less than 2 mm (1). Absence of Helichrysum
angustifolium DC and H. stoechas flower heads as adulterants
(5). Foreign matter, not more than 2% (2, 20); absence of H. italicum
(Roth) Guss. and H. stoechas flower heads (20).
Total ash
Not more than 8% (1). Not more than 7% (2).
Acid-insoluble ash
No information available.
Sulfated ash
Not more than 8.5% (20).
Water-soluble extractive
No information available.
Alcohol-soluble extractive
No information available.
Loss on drying
Not more than 12% (1). Not more than 10% (21).
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