MATERIALS AND METHODS
A total of 10 medicinal plants from Pakistan and
Malaysian origin were analyzed using atomic absorption
spectroscopy. Out of 10 nine were from Pakistan and was
methanolic extracts of different parts of medicinal plants,
one was obtained from Malaysia and it was a combination
drug in capsule dosage form. Pharmacognostic features of
medicinal herbs/products under study are mentioned in
table 1.
Analytical grade nitric acid (HNO3) and 70% perchloric
acid (HCLO4) supplied from fischer scientific were used
as reagents for wet digestion of samples. Solutions were
prepared using deionized water. All the glassware were
thoroughly washed and rinsed before use.