Record number :
1670388
Title of article :
A highly selective nitrate electrode based on a tetramethyl cyclotetra-decanato-nickel(II) complex
Author/Authors :
Ardakani، نويسنده , , M.Mazloum and Dastanpour، نويسنده , , A. and Salavati-Niasari، نويسنده , , M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
6
From page :
1
To page :
6
Abstract :
A new nitrate-selective coated-wire electrode based on the complex (6,8,15,17-tetramethyl-7H,16H-5,9,14,18-tetraazidobenzo[b,i]-cyclotetra-decanato-(2-)-K4-N,N′,N″,N‴) Ni(II) as the membrane carrier was developed. The electrode exhibits a good Nernstian slope of −57.8 ± 1.0 mV/decade and a linear range of 1.0 × 10−5–1.0 M for nitrate. The limit of detection is 5.0 × 10−6 M. It has a fast response time of 15 s and can be used for more than four months. The selective coefficients were determined by the fixed interference method (FIM) and could be used in the 2.2–9.4 pH range. The electrode was employed as an indicator electrode for direct determination of nitrate in fresh water.
Keywords :
nitrate , Coated-wire electrode , Potentiometry , ionophore
Journal title :
Journal of Electroanalytical Chemistry
Serial Year :
2004
Link To Document :
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