Arsenic is a critical element for petroleum plant that have to control during the process. The content of heavy metals was found in petroleum product such as gasoline, diesel and naphtha is related to poor performance and reduced stability of this product.

The measurements were performed by using Absorption flame AAS technique with double beam mode. The background correction mode is deuterium background correction.   The samples were diluted according to their concentration; 0.1% KCl solution and 3%HNO3 were added and the graduated flask filled to a volume of 100 ml.