Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3016
Title: Chromium(III) selective membrane sensors based on Schiff bases as chelating ionophores
Authors: Singh A.K.
Gupta V.K.
Gupta B.
Published in: Analytica Chimica Acta
Abstract: The two chromium chelates of Schiff bases, N-(acetoacetanilide)-1,2-diaminoethane (L1) and N,N′-bis(acetoacetanilide)-triethylenetetraammine (L2), have been synthesized and explored as neutral ionophores for preparing poly(vinylchloride) (PVC) based membrane sensors selective to Cr(III). The addition of lipophilic anion excluder (NaTPB) and various plasticizers viz. o-Nitrophenyloctyl ether (o-NPOE), dioctylpthalate (DOP), dibutylphthalate (DBP), tris(2-ethylhexyl)phosphate (TEHP), and benzyl acetate (BA) have found to improve the performance of the sensors. The best performance was obtained for the membrane sensor having a composition of L1:PVC:DBP:NaTPB in the ratio 5:150:250:3 (w/w). The sensor exhibits Nernstian response in the concentration range 8.9 × 10-8 to 1.0 × 10-1 M Cr3+ with limit of detection 5.6 × 10-8 M. The proposed sensor manifest advantages of relatively fast response (10 s) and good selectivity over some alkali, alkaline earth, transition and heavy metal ions. The selectivity behavior of the proposed electrode revealed a considerable improvement as compared to the best previously PVC-membrane electrode for chromium(III) ion. The potentiometric response of the proposed sensor was independent of pH of the test solution in the range of 2.0-7.0. The sensor has found to work satisfactorily in partially non-aqueous media up to 20% (v/v) content of methanol, ethanol and acetonitrile and could be used for a period of 3 months. The proposed electrode was used as an indicator electrode in potentiometric titration of chromium ion with EDTA and in direct determination in different water and food samples. © 2006 Elsevier B.V. All rights reserved.
Citation: Analytica Chimica Acta (2007), 585(1): 171-178
URI: https://doi.org/10.1016/j.aca.2006.11.074
http://repository.iitr.ac.in/handle/123456789/3016
Issue Date: 2007
Keywords: Chromium selective electrode
Poly(vinylchloride) membranes
Schiff base and potentiometric sensors
ISSN: 32670
Author Scopus IDs: 57209223382
7403420647
7402195167
Author Affiliations: Singh, A.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Gupta, V.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Gupta, B., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Funding Details: One of the authors Barkha Gupta is thankful to Ministry of Human Resource Development (MHRD), New Delhi, India for financial support.
Corresponding Author: Singh, A.K.; Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India; email: akscyfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.