Adsorptive Stripping Voltammetry for Determination of Cadmium in the presence of Cupferron on a Nafion-coated Bismuth Film Electrode
Abstrak
The method for reliable determination of Cd(II) by square wave adsorptive cathodic stripping voltammetry was done. The technique involves an interfacial adsorption of Cd(II) as Cd-cupferron complex on a Nafion-coated bismuth film electrode and subsequent stripping from the electrode by square wave cathodic voltammetric and the reduction of Cd-cupferron complex. The optimum conditions of direct reduction of Cd(II) ions was observed by 0.1 M acetate buffer electrolyte (pH 4.0) containing with 0.04 mM cupferron and 0.4 mg L-1 Bi(III) of an accumulation potential at -300 mV versus Ag/AgCl and accumulation time 60 seconds. Under these optimum conditions, the linear concentration and detection limit (3σ) were found in the range of 3.0 to 40.0 μg L-1 and 0.38 μg L-1, respectively. The relative standard deviation was 2.4% at the 5 μg L-1 (n=10). The procedure has been applied to the determination of Cd(II) in marine algae samples with satisfactory results.
Topik & Kata Kunci
Penulis (3)
Nipaporn Meepun
Suphawuth Siriket
Saravut Dejmanee
Akses Cepat
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- 2012
- Sumber Database
- DOAJ
- DOI
- 10.1016/S1452-3981(23)16885-4
- Akses
- Open Access ✓