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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Belhamel, Kamel
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Publications (5/5 displayed)
- 2013New zinc–rare earth alloys: Influence of intermetallic compounds on the corrosion resistancecitations
- 2013New zinc-rare earth alloys: Influence of intermetallic compounds on the corrosion resistancecitations
- 2011Corrosion behaviour of zinc-cerium alloys: role of intermetallic phasescitations
- 2010Selective extraction and determination of Au(III) by first-derivative Spectrophotometrycitations
- 2005Nickel Ion-Selective PVC Membrane Electrode Based on new tert-octyl Calix[6]arene Derivativecitations
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article
Selective extraction and determination of Au(III) by first-derivative Spectrophotometry
Abstract
The selective extraction of Au(III) in the presence of Zn(II) by salting-out of 2-propanol was investigated. The salting-out effect increased partitioning between water and 2-propanol in the presence of sodium chloride in aqueous–organic mixtures. This is observed through the distribution coefficient, which increases with salt addition. First-derivative spectrophotometry, which eliminates interference from overlapping spectral bands, was used for the determination of trace Au(III) in the presence of Zn(II). Absorption spectra were recorded and the first-derivative spectra were obtained using Δλ = 10 nm. The calibration graph was linear for 0.857–5.142 µg mL−1 and the detection limit was 0.038–8 µg mL−1. The proposed method has been successfully applied to the determination of trace Au(III) in synthetic mixtures and Algerian low gold ore solutions. The results agree with those obtained by atomic absorption spectroscopy and the recoveries were >98%. The relative standard deviations were in all instances less than 3%.