**Sequential Injection Anodic Stripping Voltammetry at Tubular Gold Electrodes for Inorganic Arsenic Speciation**

José A. Rodríguez1, Enrique Barrado2, Marisol Vega2, Yolanda Castrillejo2 and José L.F.C. Lima3 *1Universidad Autónoma del Estado de Hidalgo 2Universidad de Valladolid 3Universidade do Porto 1Mexico 2Spain 3Portugal* 
