Determination of Platinum Metals in Carbonaceous Mineral Raw Materials by Stripping Voltammetry

Kolpakova, N. A.; Oskina, Yulia A.; D′yachenko, E. N.; Pshenichkin, A.Ya.

doi:10.1016/j.proche.2015.10.053

Cited by 4 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rhodium was introduced into the test solution in the form of chloride complexes. [3][4][5][6] RhCl . In acid background electrolytes bismuth is present in solution in the form of aquacomplexes [Bi(Н 2 O) n ] 3+ .…”

Section: Resultsmentioning

confidence: 99%

“…The literature describes methods for SV-determining of rhodium (III) by peaks of selective electrooxidation of bismuth or mercury form intermetallic mercury-rhodium [3] and bismuth-mercury [4] …”

Section: Introductionmentioning

confidence: 99%

“…Advanced instrumental methods of analysis are necessary to determine such low rhodium content. Papers [1][2][3][4] show the capabilities of different analysis methods in determining the rhodium in mineral raw materials. As these papers show all existing methods of analysis require effective methods of sample decomposition and methods for separation of rhodium from the sample matrix.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Determination of rhodium content by the method of Stripping voltammetry in ores and technogenic raw materials

Kolpakova

D′yachenko

2016

MATEC Web Conf.

Self Cite

View full text Add to dashboard Cite

Abstract. The method of determination of rhodium by the method of Stripping voltammetry in ores and technogenic raw materials has been developed. Determination of rhodium (III) in solution by Stripping voltammetry method was carried out by peak of selective electrooxidation of bismuth from intermetallic compound Bi2Rh. 1 M KSCN was selected as a background electrolyte. The method of melting of the sample with potassium tetrafluoroborate (KBrF4) at a temperature of 500 was used for the conversion of the rhodium solution.The method of deposition of most ions present in solution of alkali metals was used to separate ions of rhodium (III) from the matrix of the samples. Ions of Pt (IV), Rh (III) and Ir (IV) remain in solution after precipitation. Ions of iridium (IV) and 10-fold excess of platinum (IV) do not interfere with the determination of rhodium (III) against the background of 1 M KSCN. IntroductionThe biggest obstacle to the research of potential natural sources of platinum group metals is extremely poorly developed base of analytical methods for their quantification. The content of rhodium in the technogenic raw materials ranges from 0.001 mg/kg to 10 mg/kg. Advanced instrumental methods of analysis are necessary to determine such low rhodium content. Papers [1][2][3][4] show the capabilities of different analysis methods in determining the rhodium in mineral raw materials. As these papers show all existing methods of analysis require effective methods of sample decomposition and methods for separation of rhodium from the sample matrix.We propose a method of stripping voltammetry (SV) as a method of analysis for determination of rhodium in mineral raw materials. This method is a highly sensitive instrumental method of analysis, which allows determining the elements after their concentration at the electrode surface, followed by sediment electrooxidation. However, determination of rhodium using this method can cause certain difficulties. We cannot detect the process of electroreduction of rhodium ions (III) in the graphite electrode (GE) on the current-voltage curves. It is connected with hydrogen evolution catalytic process that flows in parallel and results in an overlap of rhodium (III) ions electroreduction process. The process of electrooxidation of rhodium precipitate occurs at potentials greater than 1V and is overlapped by the process of oxygen evolution from water.Determination of rhodium (III) ions using SV method is carried out by rhodium IV electrodeposition together with a less noble metal (activator), followed by selective electrooxidation of metal activator. The literature describes methods for SV-determining of rhodium (III) by peaks of selective electrooxidation of bismuth or mercury form intermetallic mercury-rhodium [3] and bismuth-mercury [4] compounds (IMC). ________________________

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Determination of rhodium content by the method of Stripping voltammetry in ores and technogenic raw materials

Kolpakova

D′yachenko

2016

MATEC Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electro-deposition of platinum was conducted from solutions containing ions of indium (III). Determination of platinum was performed by a pick of selective electro-oxidation of indium from intermetallic compound with platinum [8,9]. To determine gold, a graphite electrode modified by bismuth was used [10].…”

Section: Methodsmentioning

confidence: 99%

“…Determination of platinum ions (IV) by the SV method is carried out by means of electro-deposition of these metals into an alloy with a less precious metal (activator metal) with the following selective electro-oxidation of the activator metal. There have been recorded instances of SV determination of platinum ions (IV) by picks of selective electro-oxidation of mercury [7] or indium [8,9] from intermetallic compounds with platinum.…”

Section: Introductionmentioning

confidence: 99%

Determination of Au, Pt, Pd in gold ore mineral raw materials by stripping voltammetry

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract. The paper considers the possibilities of use of the method of stripping voltammetry for finding platinum metals in mineral gold and ore raw material. A review of new options of electro-concentration of platinum metals on the surface of graphite electrode with the following sediment electro-oxidation and receipt of an analytical signal is presented: platinum finding was carried out by picks of selective electrooxidation of iridium from intermetallic compound with platinum; gold finding was carried out by picks of gold electro-oxidation on the surface of graphite electrode modified by bismuth; palladium finding was performed by picks of palladium electro-oxidation on the surface of graphite electrode. 1M HCL solution was selected as a supporting electrolyte. Gold and hydrogen elimination on the process of palladium electro-oxidation was performed by means of UV irradiation of solution in the process of electroconcentration of palladium sediment. Gold, platinum and palladium determination was carried out in mineral gold and ore raw material of Verkhneamylskiy gold and ore district.

show abstract

Voltammetry for Monitoring Platinum, Palladium and Rhodium in Environmental and Food Matrices

et al. 2023

View full text Add to dashboard Cite

The interest of researchers on quantification of Pt, Pd and Rh in the environmental and food matrices is the consequence of the production of catalytic converters for car engines. Sensitization, mutagenic effects in bacterial and mammalian cells, and increased tumour incidence are the effects of Pt, Pd and Rh at high concentrations reported in medical and occupational researches while their effects at the low environmental concentrations have not been determined. Voltammetric techniques are very advantageous to quantify PGEs in environmental and food matrices due to their intrinsic sensitivity derived from the electrochemical pre-concentration of the analyte at the electrode surface, the capability to distinguish between different redox species and/or labile from non-labile metal complexes, with applications for metal speciation studies. The analysis of PGEs by spectrophotometric methods (atomic absorption, ICP-MS, ICP-OES, etc.) suffers from several practical problems. In this article we take into consideration the research concerning environmental and food matrices from 1996 to 2022.

show abstract

Determination of Platinum Metals in Carbonaceous Mineral Raw Materials by Stripping Voltammetry

Cited by 4 publications

References 7 publications

Determination of rhodium content by the method of Stripping voltammetry in ores and technogenic raw materials

Determination of rhodium content by the method of Stripping voltammetry in ores and technogenic raw materials

Determination of Au, Pt, Pd in gold ore mineral raw materials by stripping voltammetry

Voltammetry for Monitoring Platinum, Palladium and Rhodium in Environmental and Food Matrices

Contact Info

Product

Resources

About