Trace and selective determination of cobalt(II) in water and salt samples using cathodic adsorptive stripping voltammetry in the presence of Pyrogallol Red

Hasanpour, F. and Teimori, H. and Fouladgar, M. and Taei, M. (2013) Trace and selective determination of cobalt(II) in water and salt samples using cathodic adsorptive stripping voltammetry in the presence of Pyrogallol Red. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 78 (5). pp. 717-724.

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Abstract

A sensitive and selective procedure is presented for the voltammetric determination of cobalt. The procedure involves an adsorptive accumulation of cobalt Pyrogallol Red (PGR) complex on a stationary mercury drop electrode, followed by cathodic stripping voltammetry measurement of the reduction current of the adsorbed complex at -1.17 V (vs. Ag/AgCl). The optimum conditions for the determination of cobalt include pH 11.0, 35 mu M Pyrogallol Red, an accumulation potential of -0.9 V (vs. Ag/AgCl) and scan rate 80 mV s(-1). The peak current is proportional to the concentration of cobalt over the concentration range 5.0 to 280 ng mL(-1) with a detection limit of 1 ng mL(-1) and an accumulation time of 140 s. The method was applied to the determination of cobalt in analytical grade NaCl and water samples.

Item Type: Article
Uncontrolled Keywords: adsorptive cathodic stripping voltammetry; Pyrogallol Red; Co(II) determination
Subjects: WA Public Health > Public Health Education WA.18 > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions: Reserach Vice-Chancellar Department > Cellular and Molecular Research Center
Depositing User: zahra bagheri .
Date Deposited: 08 Aug 2017 04:35
Last Modified: 08 Aug 2017 04:35
URI: http://eprints.skums.ac.ir/id/eprint/2570

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