بدون زمان بندی
نویسندگان: Mehrdad Ghaemi, L. Hajiaghababaei, Ramin M.A. Tehrani, Ashraf Sadat Shahvelayati, Jamshid Najafpour
زمان بندی: بدون زمان بندی
خلاصه مقاله: In this research, all solid state potentiometric PVC membrane sensor for rapid recognition and measurement of Hg2+ is....
In this research, all solid state potentiometric PVC membrane sensor for rapid recognition and measurement of Hg2+ is fabricated. The best composition for membrane was achieved with PVC (29%), sodium tetraphenylborate (NaTPB) as ionic additive (3%), benzoyl carbamothioyl alanine (10%) and benzyl acetate (58%). Conductive compound of all solid-state electrode was made from Graphite, Carbon Nano tube, Epoxy resin and hardener on a Copper wire. The coated wire was soaked in membrane composite and a thin layer PVC membrane was coated on surface the conducting transducer. The Nernstian slop of 28.0 mV/decade obtained for Hg2+ in concentration range 1×10-2 to 1×10-8 mole/L with low detection limit 7×10-9 mole/L at PH range of 5 to 9. The sensor response time was approximately 5s. The sensors were applied as indicator electrode in potentiometric titration of Hg2+with EDTA.