Maryam Ganbari Ganbarlo - Department of Chemistry, Faculty of Basic Sciences Islamic Azad University, Germi branch
Ahdie Ganbari Ganbarlo - Department of Chemistry, Faculty of Basic Sciences Islamic Azad University ,Ardabil branch
Ali Shamel - Department of Chemistry, Faculty of Basic Sciences Islamic Azad University ,Ardabil branch

Stability constant of the tungsten (VI) complex was investigated with Histidine ligand at ionic strength of 0.1 molar of NaClO and constant pH of 7.5 and 25°C with spectrophotometric method .Used wavelenght are between 250 to 265 with interval of 5nm job method was Used for determination of Stability constants. The results shows that tungsten (VI) with Histidine formed 1:1 complex (mono nuclear) at (فرمول در متن اصلی مقاله)