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Anion recognition through amide-based dendritic molecule: A poly(vinyl chloride) based sensor for nitrate ion

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Title Anion recognition through amide-based dendritic molecule: A poly(vinyl chloride) based sensor for nitrate ion
 
Creator GUPTA, VK
SINGH, LP
CHANDRA, S
KUMAR, S
SINGH, R
SETHI, B
 
Subject N-NITROSO COMPOUNDS
SCHIFF-BASES
PVC MATRIX
POTENTIOMETRIC SENSORS
SELECTIVE ELECTRODES
MEMBRANE-ELECTRODE
HYDROGEN-PEROXIDE
NEUTRAL CARRIER
COMPLEX
NITRITE
Amide dendrimer
Nitrate-selective electrode
Sensors
PVC membrane
Potentiometry
 
Description 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.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2012-06-26T08:36:09Z
2012-06-26T08:36:09Z
2011
 
Type Article
 
Identifier TALANTA,85(2)970-974
0039-9140
http://dx.doi.org/10.1016/j.talanta.2011.05.014
http://dspace.library.iitb.ac.in/jspui/handle/100/14197
 
Language English