Evaluation of the Potentiometric Titration Used to determinate arsenic)III( in mixed and aqueous media comparing with Atomic Absorption Method

This study aims to compare the results of two methods ,used to determinate arsenic in mixed and aqueous media: proposed potintiometrc titration and referenced atomic absorption and then applied the proposed method to some environmental samples. In this paper, Arsenic)III( has been titrated with iodine in aqueous and mixed media using the direct method and platinum electrode after choosing optimal technical and analytical conditions. The atomic absorption, which is often used to determine the arsenic in many applications, has been chosen as comparison guide, where the reaction take place between sodium borate (NaBH4) and arsenic Acid H3AsO3 to produce the effective compound AsH3 used to determine arsenic by this instrument . Different statistical treatments were used to evaluate the result of the determination of arsenic in desired media. The result of this investigation suggest that , it’s highly recommend to use the proposed method for its high efficiency, ease, simplicity and low cost comparing with atomic absorption technique that requires expensive equipment