The iodide-ion selective electrode as cationic sensor for the determination of gold

Weiss, Dalibor

doi:10.1007/bf01154267

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Electrodes Sensitive To Heavy Metal Ions1

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1973

1991

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Cited by 6 publications

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“…A very interesting way has been suggested by Weiss 85 for obtaining heavy metal electrodes. F or this purpose the silver iodide based electrode was used and a non-Nernstian response was obtained for gold in the range pAu 5-8 at low pH values.…”

Section: Electrodes Sensitive To Heavy Metal Ionsmentioning

confidence: 99%

Precipitate-based selective ion-sensitive electrodes. Recent developments in theory and applications

Püngor¹,

Tóth²

1973

Pure and Applied Chemistry

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Section: Electrodes Sensitive To Heavy Metal Ionsmentioning

confidence: 99%

Precipitate-based selective ion-sensitive electrodes. Recent developments in theory and applications

Püngor¹,

Tóth²

1973

Pure and Applied Chemistry

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Applications of Ion-Selective Electrodes

Moody¹,

Thomas²

1978

Ion-Selective Electrodes in Analytical Chemistry

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Potentiometric determination of silver(I), palladium(II) and gold(III) in mixtures by use of an iodide-selective electrode

Zaki

Mohamed

1991

Mikrochim Acta

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Two procedures are proposed for the potentiometric determination of Ag(I), Pd(II) and Au(III) in binary mixtures, by titration with potassium iodide solution, and use of a commercial iodide electrode as sensor. In the first procedure, two aliquots of the mixture are titrated, at pH 2.0 _+ 0.2 and 9.0 + 0.2, adjusted with dilute sulphuric acid and ammonia solution. At pH 2.0, the titrant reacts with both metals, whereas at pH 9.0, Ag(I) is the only reactant. The second procedure utilizes titration of two aliquots of the mixture in the presence and absence of a selective masking agent. The methods have been applied to the determination of these metals in some jewellery alloys. Experimental ReagentsAll solutions were prepared with doubly distilled water and analytical-reagent grade chemicals, unless stated otherwise. A standard 5 mM potassium iodide solution was used throughout. Silver nitrate, palladium(II) chloride and hydrogen tetrachloroaurate stock solutions (5 raM) were prepared. Solutions of the masking agents (0.1% dimethylglyoxime in ethanol, 0.1 M citric acid and 0.1 M potassium thiocyanate) were prepared from commercially available reagents. ApparatusThe potentiometric measurements were made with an Orion pH-ion meter (Model EA 920) fitted with an Orion solid-state iodide-sensitive electrode (Model 94-53) and an Orion single-junction reference electrode (Model 90-01). In pH adjustment an Orion pH-electrode (Model GX 91-05) was used.

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The iodide-ion selective electrode as cationic sensor for the determination of gold

Cited by 6 publications

References 3 publications

Precipitate-based selective ion-sensitive electrodes. Recent developments in theory and applications

Precipitate-based selective ion-sensitive electrodes. Recent developments in theory and applications

Applications of Ion-Selective Electrodes

Potentiometric determination of silver(I), palladium(II) and gold(III) in mixtures by use of an iodide-selective electrode

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