Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/8673
Title: Kinetic determination of mercury(II) at trace level from its catalytic effect on ligand substitution reaction between hexacyanoferrate(II) and nitroso-R-salt
Authors: Naik, R M
Sarkar, Joy
Keywords: Mercury(II) determination
Kinetics
ligand substitution reaction
hexacyanoferrate(II)
nitroso-R-salt
Issue Date: Sep-2005
Publisher: CSIR
Series/Report no.: C22B43/00
Abstract: A kinetic method is described for the determination of mercury(II), based on its catalytic effect on the ligand substitution reaction between hexacynoferrate(II) and Nitroso-R-Salt. The reaction is followed spectrophotometrically by measuring the absorbance at fixed times at 720 nm, the λ<sub>max</sub> of green coloured complex, [Fe(CN)<sub>5</sub>NRS]<sup>3–</sup> formed during the course of reaction under optimum reaction conditions <i style="">viz</i>, temp = 25.0±0.1 °C, pH = 6.5±0.02 and <i style="">I</i> = 0.1 M(KNO<sub>3</sub>). The method is simple, sensitive, selective, rapid and allows the determination of as little as 10<sup>–6</sup> M of mercury with good accuracy and precision. The detection limit is computed by standard procedure and found to be 1.6 <img src='/image/spc_char/cross.gif' border=0> 10<sup>–7 </sup>M of [Hg<sup>2+</sup>]. The effects of few interfering and non-interfering cations and anions on mercury(II) determination have also been reported with relative standard deviations.
Description: 563-566
URI: http://hdl.handle.net/123456789/8673
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.12(5) [September 2005]

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