WHO monographs on selected medicinal plants - travolekar.ru

Oleum Ricini
Acid-insoluble ash
Not applicable.
Water-soluble extractive
Not applicable.
Water
Not more than 0.3% according to the method of Karl-Fischer (1).
Pesticide residues
The recommended maximum limit of aldrin and dieldrin is not more than
0.05 mg/kg (1). For other pesticides, see the European pharmacopoeia (1)
and the <strong>WHO</strong> quality control methods for medicinal plant materials (18)
and pesticide residues (19).
Heavy metals
For maximum limits and analysis of heavy metals, consult the <strong>WHO</strong>
guidelines for assessing quality of herbal medicines with reference to contaminants
and residues (18).
Radioactive residues
Where applicable, consult the <strong>WHO</strong> guidelines for assessing quality of
herbal medicines with reference to contaminants and residues (18).
Other purity tests
Specific gravity d 25 : 0.953–0.965 (1, 3, 4).
25
Saponification value: 176–187 (3–5).
Acid value: not more than 1.5 (3, 4).
Hydroxyl value: 155–177 (3, 4).
Iodine value: 80–90 (1, 3).
Peroxide value: not less than 150 (1).
Optical rotation: +3.5 to +6.0 (1).
Refractive index: 1.478–1.480 (5).
Chemical assays
Fatty acid content: palmitic (2% maximum), stearic (2.5% maximum),
oleic and isomers (2.5–6.0%), linoleic (2.5–7.0%), linolenic (2.5% maximum),
eicosenoic (1.0% maximum), ricinoleic acid (85–92%) and other
fatty acids (maximum) determined by gas chromatography (1).
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