Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4065
Title: Potentiometric sensor for the nanoscale monitoring of Ni2+ ion in environmental samples by the fabrication of coated pyrolytic graphite electrode based on a novel C–C-coupled compound
Authors: Sahani M.K.
Singhal D.
Singh A.K.
Jain A.K.
Singh U.P.
Narang S.
Published in: International Journal of Environmental Analytical Chemistry
Abstract: Novel ligand 5,5ʹ-((3-nitrophenyl)methylene)bis(2,6-diaminopyrimidin-4(3H)-one) (L) was synthesised and characterised. Preliminary studies on L have showed that it has more affinity towards the Ni2+ ion. Thus, the L was used as the electroactive material in the fabrication of poly(vinyl chloride) (PVC)-based membrane sensors such as coated graphite electrode (CGE) and coated pyrolytic graphite electrode (CPGE). Several polymeric membranes were fabricated by incorporating L as ionophore, NaTPB as anion excluders and BA, 1-CN, DBP, DOP and o-NPOE as solvent mediators and their effect on potentiometric response studied. Comparative electroanalytical studies performed on the CGE and CPGE depict that the CPGE with optimised membrane composition of L:PVC:o-NPOE:NaTPB in the ratio of 7:33:58:2 (w/w, mg) exhibited the best response in terms of wide working concentration range from 2.0 × 10− 8 to 1.0 × 10− 1 mol L−1, (3.64 µgL−1 –18.2 g L−1) lower detection limit of 8.1 × 10– 9 mol L−1 (1.47 µg L−1) with Nernstian compliance of 29.4 ± 0.2 mV decade−1 of activity of Ni2+ ion in the pH range of 3.5–9.0. The sensor can work satisfactorily in water–acetonitrile and water–methanol mixtures. It can tolerate 30% acetonitrile and 20% methanol content in the mixtures. The sensor showed fast response time of 8 s and could be used successfully for a period of 4 months. The sensor reflects its utility in the quantification of Ni2+ ion in real samples and has been successfully employed as an indicator electrode in the potentiometric titration of Ni2+ ion with EDTA. © 2016 Informa UK Limited, trading as Taylor & Francis Group.
Citation: International Journal of Environmental Analytical Chemistry (2016), 96(12): 1170-1187
URI: https://doi.org/10.1080/03067319.2016.1244671
http://repository.iitr.ac.in/handle/123456789/4065
Issue Date: 2016
Publisher: Taylor and Francis Ltd.
Keywords: Coated pyrolytic graphite electrode
C–C coupling
Ni2+ ion-selective electrode
Potentiometry
Single-crystal X-ray diffraction
ISSN: 3067319
Author Scopus IDs: 56037950500
7003355678
57209223382
7404463053
57203181883
56168890200
Author Affiliations: Sahani, M.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Singhal, D., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Singh, A.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Jain, A.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Singh, U.P., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Narang, S., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, India
Funding Details: This work was supported by the Ministry of Human Resource Development.
Corresponding Author: Singh, A.K.; Department of Chemistry, Indian Institute of Technology-RoorkeeIndia; 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 Repository are protected by copyright, with all rights reserved, unless otherwise indicated.