Heavy Metal Analysis in Urtica Dioica Aerial Parts Using Automatic Atomic Absorption Spectrophotometer Controlled via Computer Data System

The present paper investigates the levels of heavy metal contamination i.e. lead, cadmium, mercury and arsenic in Urtica dioica aerial parts using automatic atomic absorption spectrophotometer (AAS) by computer plotting. The computer data system allows higher precision, higher sensitivity, and lower detection limits. The determination of heavy metals even in traces is of utmost importance as these metals are involved in biological cycles and their accumulation causes high toxicity. The paper compares the data of toxic metals with respect to permissible/acceptable limits of different countries. The level of heavy metals for Urtica dioica was found to be within the permissible limits for safe human use.