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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/14197

Title: Anion recognition through amide-based dendritic molecule: A poly(vinyl chloride) based sensor for nitrate ion
Authors: GUPTA, VK
SINGH, LP
CHANDRA, S
KUMAR, S
SINGH, R
SETHI, B
Keywords: N-NITROSO COMPOUNDS
SCHIFF-BASES
PVC MATRIX
POTENTIOMETRIC SENSORS
SELECTIVE ELECTRODES
MEMBRANE-ELECTRODE
HYDROGEN-PEROXIDE
NEUTRAL CARRIER
COMPLEX
NITRITE
Issue Date: 2011
Publisher: ELSEVIER SCIENCE BV
Citation: TALANTA,85(2)970-974
Abstract: Poly(vinyl chloride) (PVC)-based membranes of N,N-bis-succinamide-based dendritic molecule with tetrabutyl ammonium bromide (TBAB) as a cation inhibitor and dibutylphthalate (DBP), dioctylphthalate (DOP), dibutyl (butyl) phosphonate (DBBP) and 1-chloronaphthalene (CN) as plasticizing solvent mediators were prepared and used as nitrate ion-selective electrodes. Optimum performance was observed with the membrane having I-PVC-TBAB-DBP in the ratio 1:33:1:65 (w/w). The electrode has a linear response to nitrate with a detection limit of 3.9 x 10(-5) +/- 0.07 M and Nernstian compliance (57.0 +/- 0.2 mV/decade) between pH 2.8 and 9.6 with a fast response time of about 20s. The selectivity coefficient values of the order of 0.001 for mono-; bi- and trivalent anions; indicate high selectivity for nitrate ions over these anions. The preparation procedure of the electrode is very easy and inexpensive. The electrodes were used over a period of 45 days with good reproducibility. The analytical usefulness of the proposed electrode has been evaluated by its application in the determination of nitrate ions in waste water samples. (C) 2011 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.talanta.2011.05.014
http://dspace.library.iitb.ac.in/jspui/handle/100/14197
ISSN: 0039-9140
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