Table 1.

Physicochemical characteristic of R. angustifolia leaves.

Parameters	Value* (% w/w)	Requirement (materia medica ndonesia V) (%)
Water-soluble extract	27.14±0.47	Not less than 28
Ethanol-soluble extract	20.17±0.43	Not less than 8
Total ash	10.75±0.01	Not less than 10
Water-soluble ash	2.67±0.47	No specific parameter
Acid-insoluble ash	0.52±0.05	Not more than 3
Loss on drying	10.02±0.21	Not more than 10

*Mean±SD in triplicate.