Potentiometric Mercury measurement by using coated wire sensor based on benzoylcarbamothiol alanine

In this study, coated wire potentiometric PVC membrane sensor for simple and rapid identification andmeasurement of Hg۲+ is fabricated. The best composition for membrane was achieved with PVC (۲۹%), ionic additive assodium tetraphenylborate (NaTPB) (۳%), benzoyl carbamothiol alanine (۱۰%) and benzyl acetate (۵۸%). The Nernstianslop of ۳۱.۴۸ mV/decade obtained for Hg۲+ in concentration range ۱×۱۰-۲ to ۱×۱۰-۵ mol/L at PH range of ۵ to ۱۰. Thesensors were applied as indicator electrode in potentiometric titration of Hg۲+with EDTA.

کلیدواژه ها:

Coated Wire Electrode ، Potentiometry ، Benzoyl Carbamothiol Alanine