INTRODUCTION The plants for growing need relatively low amount of mental ions. Natural soil consists of great amount of metal elements. Despite the selective absorption in root cellular membrane, it is possible a few metal ions are found in plant tissues ¹. Heavy metals are important environmental pollutants and they will be toxic as the result of human activities in natural and agricultural areas. The reason of toxicity of heavy metals in higher concentration is that they disturb some vital factors of body. Some metals are found naturally in the body and are essential for ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org An International Open Free Access, Peer Reviewed Research Journal ISSN: 0970-020 X CODEN: OJCHEG 2014, Vol. 30, No. (2): Pg. 737-743 A Survey of The Effect of Some Heavy Metals in Plant on The Composition of the Essential Oils Close to Veshnaveh-Qom Mining Area MOHAMMAD HADI GIVIANRAD*and AZAM HASHEMI Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran. *Corresponding author Email: givianradh@yahoo.com http://dx.doi.org/10.13005/ojc/300246 (Received: April 02, 2014; Accepted: May 01, 2014) ABSTRACT The purpose of this study was to evaluate the effect of copper and silver in the plants on the mining area and the ingredients of essential oils. Plants collected from the same family, but they were collected randomly from various regions. The concentration of heavy metal in plant samples collected from Veshnave, Qom, Iran have been determined by Flame Atomic Absorption Spectrometry (FAAS). The chemical composition of essential oil isolated by hydrodistillation from Tanacetum polycephalum and was determined using Gas Chromatography/Mass Spectrometry (GC- MS). Results obtained from unidirectional variance analysis suggest that there is a meaningful statistical difference between various regions. Key words: FAAS; Microwave; Copper; Silver; GC- MS; Tanacetum polycephalum. health. Naturally, low-concentration heavy metals are found and they are considered low-quantity metals. They are toxic in high concentration or lead to inefficiency and defect in other low-quantity metals ³. In high concentration of metals, substitution with essential metals is occurred and as essential metals play important role in formation of pigments and enzymes, the pigments are disrupted and existing elements in soil will be unsuitable for plant growth and biological variety is eliminated 13,14 . Heavy metals have no role in the body as a metal and they may be extremely toxic 4 .