Author/Authors :
Hajiaghababaei، Leila نويسنده Department of Chemistry, Islamic Azad University, Shahre Rey Branch, Tehran, Iran , , mohamadi، Neda mohamadi نويسنده Young Researchers and Elite Club, Kerman Branch, Islamic Azad University, Kerman, Ir , , Adhami، Forogh نويسنده Department of Chemistry, College of Science, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran Adhami, Forogh
Abstract :
Ion potentiometric sensors are playing an important role in environmental analysis
because of their simplicity and rapidity. In this study, a potentiometric liquid membrane
sensor for simple and fast quantification of chromium in various samples was made. Nbanzoyl-
N?(6-methyl-2-pyridyl) thiourea was selected as a sensing material in the organic
phase of the PVC membrane. The wide linear range (10-6-10-1 mol L-1), low detection limit
(3.0×10-7 mol L-1), and fast response time (~5 s) are the characterizations of this
electrochemical sensor. The effects of some factors such as internal solution, pH, life time
and selectivity were investigated. Finally, it was used for direct determination of chromium
and as an indicator electrode in potentiometric titration of chromium ion
