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Ni(II)-ammonium morpholine dithiocarbamate complex studies with polarography at DME by catalytic hydrogen currents in various environmental samples

N.Venkatasubba Naidu, S.Kanchi, P.Krishnamurthy, K.Saraswathi

This paper dealswith the simple, sensitive catalytic hydrogen polarographic method for the determination ofNi(II) withAmmMorpholine dithiocarbamate (AmmMor-DTC) in various water samples and agricultural materials. The method was based on the catalytic hydrogen wave ofAmmMor-DTCNi( II) complex in the presence of NH4Cl-NH4OH medium at pH 6.0 and produce a catalytic hydrogen wave at -1.30 V vs SCE. Various parameters such as effect of pH, NH4Cl-NH4OH,AmmMor-DTC,metal ion concentration and foreign ion effect on peak height were investigated to enhance the sensitivity of the present method. The obtained results were in good agreement with differential pulse polarographic method in terms of terms of StudentÂÂ’s ‘tÂÂ’-test and Variance ratio ‘fÂÂ’-test. The proposed method was applied for the determination ofNi(II) in various water samples and agriculturalmaterials.