Characteristics of the plant Tribulus terrestris L.
Tribulus terrestris L. is a herbaceous perennial plant from the Zigophyllaceae family, with a lot of branching, forming flat patches long stems, common in stony places in the warm parts of the country. The researches about the main active substances in the plant – saponins, had been made in Bulgaria. Steroid saponins from furostanol and spirostanol types and sapogenins have been isolated. In the saponins mix, predominate the furostanol saponins protodioscine and protogracilin. Flavonol glycosides like astragalin, tribuloside, rutin, tannic compounds and oils are also found. For Tribulus terrestris plant extract production we use the whole areal part of the plant (herba), harvested in the flowering period.
Definition: Product from the aerial part of the plant Tribulus terrestris.
Characteristics: Light brown to brown amorphous powder, with specific odour, well soluble in water and in 50% ethanol.
Identification: A A: furostanol saponins – colour reaction
Testing for purity:
pH (10% solution): 3.0 to 5.0
Sulphated ash, %, not more than:10.0
Heavy metals, %, not more than: 0.001
Loss on drying, %, not more than: 5.0
Content of active substances:
Tannic compounds, determined as tannin, %, per dry substance, not more than: 8.0
Flavonoids, determind as rutin, %, per dry substance, not more than: 10.0
Furostanol saponins, determined as protodioscin, %, per dry substance: 55.0 to 65.0
Control: The qualitative indices of the product are controlled in accordance to company documentation, where are included assay methods and their validity concerning linearity and repetition.
Storage: At a temperature of 20 – 25oC.
Shelf life: 3 (three) years from the date of production.
Application: It is used alone or in combination with other plant extracts in production of food or feed additives.