Determination of Platinum‐Group Elements and Gold in Ferromanganese Nodule Reference Samples

Berezhnaya, E. D.; Дубинин, А. В.

doi:10.1111/ggr.12130

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…Depending on Ga mass fraction in the sample, 9–33 mg of sample powder was utilised to obtain ~ 200 ng Ga for high precision isotopic determination. Manganese nodules were digested in 7‐ml Savillex vials by a 3 ml mixture of HCl + HNO 3 + HF (3:2:1) following the method described by Berezhnaya and Dubinin (). Other samples were dissolved using the high‐pressure bomb method modified from Hu and Qi ().…”

Section: Methodsmentioning

confidence: 99%

Determination of Gallium Isotopic Compositions in Reference Materials

Feng

Zhou

Liu

et al. 2019

Geostandard Geoanalytic Res

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The interest in the study of gallium (Ga) stable isotope fractionation in low‐ and high‐temperature environments has increased significantly in the last few years. However, a unified reference material (RM) is still lacking for the Ga isotope research community, which hinders interlaboratory comparison between different groups. Consequently, certification of Ga isotopic reference materials for interlaboratory comparison is of high priority. In this study, Ga isotope ratio data for ten geological RMs including silicates, shales and ferromanganese nodules, and two pure Ga RMs including NIST SRM 994 and NIST SRM 3119a reported by three different groups, were determined by MC‐ICP‐MS. Sample matrices of geological RMs were separated by a two‐column separation method with the use of AG MP‐1M and AG 50‐X8 resin, separately, and quantitative recoveries of > 99% Ga were obtained for all geological RMs. Instrumental mass bias was corrected by the combined calibrator‐sample bracketing and internal normalisation model. Validation of the proposed method was performed by analysing synthetic solutions. After normalisation of all available δ71Ga data of geological RMs to a single Ga RM, results obtained in our study are in agreement with previously reported results.

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Section: Methodsmentioning

confidence: 99%

Determination of Gallium Isotopic Compositions in Reference Materials

Feng

Zhou

Liu

et al. 2019

Geostandard Geoanalytic Res

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“…Diffraction patterns were collected from 2θ = 5 • to 60 • . Determination of platinum group elements (Ru, Pd, Ir, and Pt) and gold has been carried out by the method of mass spectrometry with inductively coupled plasma (ICP-MS) using Agilent 7500a (Agilent Technologies, Santa Clara, CA, USA) after preliminary concentration on anionite Dowex 1 × 8 [33]. The standard addition method has been applied to eliminate losses during chromatography.…”

Section: Samplesmentioning

confidence: 99%

Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

et al. 2018

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Distribution of platinum group elements (Ru, Pd, Pt, and Ir) and gold in hydrogenous ferromanganese deposits from the southern part of the Atlantic Ocean has been studied. The presented samples were the surface and buried Fe-Mn hydrogenous nodules, biomorphous nodules containing predatory fish teeth in their nuclei, and crusts. Platinum content varied from 47 to 247 ng/g, Ru from 5 to 26 ng/g, Pd from 1.1 to 2.8 ng/g, Ir from 1.2 to 4.6 ng/g, and Au from less than 0.2 to 1.2 ng/g. In the studied Fe-Mn crusts and nodules, Pt, Ir, and Ru are significantly correlated with some redox-sensitive trace metals (Co, Ce, and Tl). Similar to cobalt and cerium behaviour, ruthenium, platinum, and iridium are scavenged from seawater by suspended ferromanganese oxyhydroxides. The most likely mechanism of Platinum Group Elements (PGE) accumulation can be sorption and oxidation on δ-MnO 2 surfaces. The obtained platinum fluxes to ferromanganese crusts and to nodules are close and vary from 35 to 65 ng•cm −2 •Ma −1. Palladium and gold do not accumulate in hydrogenous ferromanganese deposits relative to the Earth's crust. No correlation of Pd and Au content with major and trace elements in nodules and crusts have been identified.

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“…The analysis of the platiniferous ores and flotation concentrate samples is challenging because of the low PGM concentrations and their heterogeneous distribution in the matrix. Therefore, their determination is usually preceded by isolation from the gangue material and preconcentration (Berezhnaya and Dubinin, 2016;Bayrak et al, 2017). In South African mining and metallurgical testing laboratories this is accomplished mainly by fire assay using nickel sulphide or lead collection followed by spectrometric determination (Vanhaecke et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

A new preconcentration technique for the determination of PGMs and gold by fire assay and ICP-OES

Masasire

Rwere

Dzomba

et al. 2022

J. S. Afr. Inst. Min. Metall.

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Accurate determination of platinum group metals (PGMs) and gold (Au) has always proven to be a difficult task, due to their low concentrations in platiniferous ores. The most common preconcentration technique used in analysis of these metals is fire assay with a flux containing nickel or lead. This technique can be improved by using co-collectors. Here we hypothesise that Fe, Co, and Cu can be used as co-collectors to enhance separation and preconcentration of PMGs and gold by fire assay. To test this hypothesis, geological exploration samples from Siyanda Union Mine (Northam, South Africa) were analysed by an inductively coupled plasma-optical emission spectrometer (ICP-OES) for PGMs (Pt, Pd, and Rh) and Au. A control sample (certified reference material AMIS 0426) was also analysed by the same technique. The PGM and Au recoveries from the control sample ranged from 83% to 105% for all three co-collectors, with relative standard deviations less than 10% for the control sample and 7% for the geological samples. The PGM and Au recoveries by Fe and Co co-collectors were modestly higher than that of the Cu-collector. These results indicate that Fe and Co are better co-collectors than Cu, presumably due to the loss of analyte when using Cu. Taken together, Fe and Co co-collectors can be viable alternatives for analysis of PGMs and gold using the fire assay method.

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Determination of Platinum‐Group Elements and Gold in Ferromanganese Nodule Reference Samples

Cited by 12 publications

References 21 publications

Determination of Gallium Isotopic Compositions in Reference Materials

Determination of Gallium Isotopic Compositions in Reference Materials

Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

A new preconcentration technique for the determination of PGMs and gold by fire assay and ICP-OES

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