Nowadays, herbal medicines are a common form of alternative
medicine because they are perceived as being natural and safe. One
well-known herb in southern Asia is Andrographis paniculata. It has
been reported to possess antihepatotoxic, antibiotic, antimalarial,
antihepatitic, antithrombogenic, antiinflammatory, and anti-snake
venom. It has also the potential for being developed as a cancer therapeutic
agent. Even though herbal medicines have many significant
benefits, they still have important problems including contamination
with heavy metals [1]. Herbal medicines contaminated with
heavy metals arise from contaminated agricultural lands and/or
the production process. Hence, the determination of heavy metal
content in herb is important for both toxicological and acceptance
criteria. Several analytical techniques such as atomic absorption