Author/Authors :
Hajiaghababaei، Leila نويسنده Department of Chemistry, Islamic Azad University, Shahre Rey Branch, Tehran, Iran , , Shahvelayati، Ashraf Sadat نويسنده Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, Iran Shahvelayati, Ashraf Sadat , Aghili، Seyedeh Azam نويسنده Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, Iran Aghili, Seyedeh Azam
Abstract :
In this study, a Cd2+ potentiometric ion selective membrane sensor was prepared based on the selective complexation between 4b,6,7,9b-Tetrahydroxy-4bH-indeno[1,2-b]benzofuran-10(9bH)-one(ninhydrin-pyrogallol monoadduct) as ionophore and Cd2+ ion. The electrode exhibits a Nernstian response for Cd2+ ion over a concentration range of 1.0×10-1 to 1.0×10-4 mol L-1 with a slope of 28 mV per decade. The limit of detection of the sensor is 7.0×10-5mol L-1. The sensor has a relatively fast response time (?5 s) and a useful working pH range of 3.0–7.0. Interference of some cations was also evaluated. It was used as an indicator electrode in potentiometric titration of Cd2+ with EDTA and in direct determination of Cd2+ in water and wastewater samples. The results indicate that this electrode is sensitive for determination of Cd2+
