Saudi Journal of Engineering and Technology (SJEAT)
Volume-3 | Issue-05 | 286-292
Original Research Article
A Simple Procedure for Preconcentration of Trace Amounts of Co (II), Cu (II) and Ni (II) Using A New Chelating Resin
Syed Kashif Ali
Published : May 30, 2018
Abstract
A new method for preconcentration of ultratrace amounts of Co (II), Ni(II)
and Cu(II) ions in various matrices has been proposed. The method is based on the
adsorption and chelation of the metal ions on Amberlite XAD-4 resin modified with
Quinol via azotisation prior to their determination by standard spectrophotometric
method. The effect of pH, type, concentration and volume of eluent, sample
volume,flow rates of sample and elution solutions, and interfering ions have been
investigated. The optimum pH for retention of the metal ion were10.0, 7.0 and 7.0
respectively. Eluent for quantitative elution was 5 ml of 2 mol l−1 HCl. The optimum
sample and eluent flow rates were found to be 2.5 ml min−1. The sorption capacity of
the resin was found to be 0.60, 0.45 and 0.52mmolg-1 for Co (II), Ni (II) and Cu (II)
respectively. The preconcentration factor of the method was 250 for all the metals.
The detection limit values were in the range of 3.0- 5.0 µgl-1. The accuracy of the
method was confirmed by analyzing standard synthetic mixtures and standard
addition methods. This procedure was applied to the determination of Cobalt, Nickel
and Copper from various water samples and SRM’s.