Author/Authors :
Chandra، Sulekh نويسنده Department of Chemistry, Zakir Husain College,University of Delhi, J.L.N.Marg, New Delhi-110002, India , , Deepshikha، Deepshikha نويسنده Department of Chemistry, Zakir Husain Delhi College, University of Delhi, New Delhi, 110002, India , , Sarkar، Anjana نويسنده School of Applied Sciences, Netaji Subhas Institute of Technology, University of Delhi, Azad Hind Fauj Marg, Sector-3, Dwarka, New Delhi-110078, India ,
Abstract :
Novel polymeric membrane electrode based on o-hydroxyacetophenone
carbohydrazone (OHAC) as a neutral ionophore carrier has been prepared and explored as
silver(I) ion selective electrode. The addition of lipophilic anion excluder (NaTBP) and
various plasticizers viz. o-nitrophenyl octyl ether (o-NPOE), dibutyl phthalate (DBP) and
butyl acetate (BA) have found to improve the performance of membrane sensor which have a
composition of I:NaTBP:NPOE:PVC in the ratio 3:2:62:33 (w/w; mg). The electrode exhibit
Nernstian slope for silver (I) ions over wide concentration ranges from 1.0×10-7 M to
1.0×10-2 M with limits of detection 1.6×10-7 M. The response time was found to be 10 s. The
potentiometric responses were independent of the pH of the test solutions in the pH range of
3.0 to 8.0. The proposed electrode revealed good selectivity over a wide variety of other
cations including alkali, alkaline earth, transition and heavy metal ions. The proposed PVC
electrode was used as an indicator electrode in the potentiometric titration of Ag+ ions with
KI and NaCl solutions and in direct determination in different water samples and urine
sample of peoples working as jewelry maker.
