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|Title:||Trace determination of Ni(II) and Co(II) by adsorptive stripping voltammetry using I-nitroso-2-naphthol|
Joshi, A P
|Abstract:||A rapid differential pulse adsorptive stripping voltammetric method has been developed for the trace determination of nickel and cobalt. The studies have been carried out in 0.01 M NH4Cl solution at pH 9.5 in a solution containing 1μM 1-nitroso-2- naphthol. Two distinct peaks are obtained for nickel and cobalt at-0.39 V and -0.51 V respectively. Under the optimum conditions of accumulation potential, accumulation time, rest period, concentration of ligand, drop size, scan rate, pulse amplitude, the 3σ detection limit is found to be 0.2 ppb. The method has been applied to the determination of Ni(II) and Co(II) in spiked water samples, standard alloy samples and various food samples.|
|Appears in Collections:||IJC-A Vol.42A(01) [January 2003]|
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