%0 Conference Proceedings %T Conducting Polypyrrole Film Doped with Anionic Chromotropic Acid as a Solid State Potentiometric Sensor for Cr(VI) %A Mahrooghi, Maral %A Ashraf, Narjes %A Arbab Zavar, Mohammad Hossein %J بیستمین کنفرانس شیمی تجزیه ایران %D 2014