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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3021
Title: A selective membrane electrode for lanthanum(III) ion based on a hexaaza macrocycle derivative as ionophore
Authors: Singh A.K.
Saxena P.
Mehtab S.
Gupta B.
Published in: Analytical Sciences
Abstract: We have developed a highly La(III)-selective PVC membrane electrode based on a hexaaza macrocycle, 8,16-dimethyl-6,14-diphenyl-2,3,4:10,11,12-dipyridine- 1,3,5,9,11,13-hexaazacyclohexadeca-3,5,8,11,13,16-hexaene [Bzo 2 Me 2 Pyo 2 (16)-hexaeneN 6 ] (I) as membrane carrier, dibutylbutyl phosphonate (DBBP) as solvent mediator and sodium tetraphenylborate (NaTPB) as lipophilic additive. The best performance was given by the membrane of macrocycle I having a composition 10:260:5:120 (I:DBBP:NaTPB:PVC). The electrode exhibits a Nernstian response to La(III) ion in the concentration range 1.0 × 10 -1 - 7.94 × 10 -7 M with a slope of 19.8 ± 0.2 mV/decade of concentration and a detection limit of 5.62 × 10 -7 M. The response time of the sensor is 12 s and it can be used over a period of 4 months with good reproducibility. The electrode works well over a pH range of 2.5 - 10.0 and in partially non-aqueous medium with up to 30% organic content. The sensor was also used as an indicator electrode in potentiometric titration of La(III) ions with EDTA and for determining La(III) concentration in real samples. 2006 © The Japan Society for Analytical Chemistry.
Citation: Analytical Sciences (2006), 22(10): 1339-1344
URI: https://doi.org/10.2116/analsci.22.1339
http://repository.iitr.ac.in/handle/123456789/3021
Issue Date: 2006
Publisher: Japan Society for Analytical Chemistry
ISSN: 9106340
Author Scopus IDs: 57209223382
56235119700
8954152100
7402195167
Author Affiliations: Singh, A.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee-247 667, India
Saxena, P., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee-247 667, India
Mehtab, S., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee-247 667, India
Gupta, B., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee-247 667, India
Corresponding Author: Singh, A. K.; Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee-247 667, India; email: akscyfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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