Nickel sulfide fire assay improved for pre-concentration of platinum …
A method was developed for ultra-trace determination of all six platinum group elements (PGE) by inductively coupled plasma-mass spectrometry (ICP-MS). With involvement of Fe to the fusion charge compositions of the conventional NiS fire assay, a whole assay button in water may disintegrate into pow …
Preconcentration of UG2 Platinum Ore Economic …
Abstract. Mining and plant disciplines can benefit from pre-concentration of UG2 platinum ores in a dense medium separation (DMS) plant. The main benefit of DMS is the selective discard of waste from the feed stream, thus improving project economics while reducing the power and water requirements for processing.
Elimination of reagent blank problems in the fire-assay pre
Fire assay is a classical method used for the separation of platinum group elements and gold (PGE + Au) by pre-concentration with a collector. In the nickel sulphide fire assay, nickel and sulphur are used for the collection of PGE + Au. We have successfully reduced the mass of the collectors used without affecting element recovery.
Magnetic Concentration of Platinum Group Metals from
Spent automobile catalysts are the most important secondary source of platinum group metals (PGMs). However, effective recovery of PGMs from catalyst scraps is difficult because they are present in only small quantities as chemically stable substances. In this study, in order to improve the efficiency of the existing recycling …
Energy levels and concentrations for platinum in silicon
The energy levels and electrically active concentrations of platinum in silicon have been measured by Hall techniques. Analysis shows platinum to have two electrically active sites. The usual site NPtI (assumed to be substitutional) predominates (>80%) and has two levels, a donor at Ev +0·28 eV, degeneracy γI+ =2 in p -type material and an ...
Short-term variations of platinum concentrations in contrasting coastal
Ashing was applied as a pre-concentration method for Pt content in biological material (e.g. Schäfer et al., 1998). ... Platinum concentrations in estuaries can both derive from natural sources including rock leaching and weathering (Upper Continental Crust Pt content of 2.6 pmol.g −1; ...
Determination of the Platinum‐Group Elements and Gold
The concentration of platinum-group elements (PGE) was determined using ICP-MS in combination with nickel sulphide fire assay pre-concentrations ( Plessen and Erzinger, 1998) that provides high ...
Trends of Technological Development of Platinum Group
Platinum was recovered from the leaching solution by conventional precipitation technique, and the platinum obtained by each process was analyzed chemically. It was found that 94% of the platinum ...
Single-Step Hydrometallurgical Method for the Platinum …
Platinum group metals (PGMs) are considered critical raw materials, thus their recycling and re-use is of outmost importance. Among the PGMs, platinum (Pt), palladium (Pd) and rhodium (Rh) are the basic metals used in catalytic converters. ... pretreatments, such as reduction or pre-concentration, have been avoided in this novel …
Oxygen reduction on platinum in aqueous sulphuric acid in …
The oxygen reduction reaction (ORR) was studied using a rotating disk electrode. The kinetic current density (cd) at 0.7 V RHE was reduced by more than a factor of 10 on pre-reduced Pt and a factor of 2.5 on pre-oxidised Pt when comparing ORR rate for pure sulphuric acid to that in 0.18 M H 2 SO 4 + 0.1 M NH 3 solution which was the …
Determination of the platinum
Platinum group elements (PGE) and Au data in polymetallic oceanic ferromanganese nodule reference samples and crust samples obtained by inductively coupled plasma mass spectrometry (ICP-MS), after separation and pre-concentration by nickel sulfide fire-assay and Te coprecipitation, are presented. By optimizing several …
Analysis of Platinum Group Elements in …
This review critically discusses techniques for separation, pre-concentration and detection of platinum group elements in environmental samples. State-of-the-art …
A simple, sensitive analytical method for platinum
The proposed method consists into two main steps: 1) pre-treatment of samples (digestion); and 2) analytical determination of platinum by ICP–MS. 3.1. Pre …
Live Platinum Price Charts | Platinum Price Per Ounce
See the Platinum price per ounce & Platinum price per gram to understand your purchasing power. ... Pre-1933 U.S. Gold Coins. How Much Your Platinum is Worth. Enter your amounts. Spot Price. ... The concentration of most of the world's platinum in one small region creates risk. In 2023, South Africa experienced serious electrical grid ...
Sequential extraction of platinum, cisplatin and carboplatin …
Optimization of furnace temperature program is necessary for the determination of platinum using ETAAS. Hence, the effect of pyrolysis and atomization temperatures on the absorbance signal of 10 ng mL −1 of platinum before and after pre-concentration using the proposed VC-CPE was studied and these results are shown in …
Nickel sulfide fire assay improved for pre …
Nickel sulfide fire assay improved for pre-concentration of platinum group elements in geological samples: a practical means of ultra-trace analysis combined with inductively coupled plasma-mass spectrometry - …
Nickel sulfide fire assay improved for pre-concentration of platinum …
A method was developed for ultra-trace determination of all six platinum group elements (PGE) by inductively coupled plasma-mass spectrometry (ICP-MS).With involvement of Fe to the fusion charge compositions of the conventional NiS fire assay, a whole assay button in water may disintegrate into powder and then be dissolved with HCl. The insoluble …
Ultra-trace analysis of silver and platinum in seawater by ICP …
Precise and accurate quantification of Ag and platinum group elements in marine, estuarine and riverine waters is challenging due to the complex matrices and ultra-low concentrations in the pmol kg − 1 and fmol kg − 1 range. A methodological approach has been developed for the analysis of Ag and Pt in seawater based on the extraction of …
Determination of the Platinum‐Group Elements and Gold in …
The platinum-group elements (PGE) and gold have been determined in twenty international rock reference materials by inductively coupled plasma-mass spectrometry (ICP-MS) after pre-concentration by a nickel sulfide fire assay. It was possible to achieve determination limits for a 50 g sample that ranged from 1 pg g-1 (Rh) to 23 pg g-1 (Au ...
Pre-concentration and Determination of Platinum (IV) in …
The profile of Platinum uptake on this sorbent reflects good accessibility of the chelatingsites in the aniline-formaldehyde. The equilibrium adsorption data of Platinum ion modified resin were analyzedby four isotherm models such as Langmuir, Freundlich,Temkin and Redlich–Peterson. Langmuir isothermparameters obtained from the four …
Selective and Efficient Platinum Group Metal
Poly(styrene-triethylammonium cation) (PIL-TEA) has a localized functional group of triethylammonium and potential Platinum Group Metals adsorption applications for industrial wastewater. Selective and Efficient Platinum Group Metal Adsorption from Wastewater by Localized Triethylamine-Based Poly(Ionic Liquid) | ACS ES&T Water
Determination of low concentrations of platinum group elements …
Determination of Platinum-Group Elements in Geological Samples by Isotope Dilution-Inductively Coupled Plasma-Mass Spectrometry Combined with Sulfide Fire Assay Pre-concentration Article Full-text ...
Extraction and pre-concentration of platinum and …
We report on the use of mesoporous silica microparticles (μPs) functionalized with quarternary amino groups for the isolation of platinum and palladium tetrachloro complexes from aqueous road dust digests. The μPs have a size ranging from 450 to 850 nm and are suspended directly in the aqueous digests, upon which the …
Determination of low concentrations of platinum group …
Accurate and precise determination of platinum group elements (PGEs) at ppb concentrations in geological samples is important but problematic. This paper reports an improved analytical method for the determination of Pt, Pd, Ru, Ir and Rh at sub-ppb levels by isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP-MS). …
Cisplatin: Package Insert
Strengths/Concentrations: 50 mg/50 mL (1 mg/mL) 100 mg/100 mL (1 mg/mL) 200 mg/200 mL (1 mg/mL) ... Cisplatin is contraindicated in patients with a history of allergic reactions to cisplatin or other platinum-containing compounds. ... Pre Treatment Hydration: Patients should be adequately hydrated before and for 24 hrs. after …
Extraction of precious metals by concentration from
On the whole, there is an increase in the concentration index for precious metals: enrichment with respect to platinum metals reaches a factor of 5 with an output of concentrate of 20%. The introduction of known flotation regulators ([CuSO 4 ] = 50 g/ton and [Na 2 CO 3 ] = 500 g/ton) made it possible in a single stage to extract into an ...
Pre-concentration and Determination of Platinum …
Platinum. Article. Pre-concentration and Determination of Platinum (IV) in Water Samples Using Chelating Resin by Inductively Coupled Plasma Atomic Emission …
Recent advances in the preconcentration and …
To use more common and more affordable techniques, a preconcentration step is necessary to increase their concentration to a measurable value. An overview of the application of preconcentration techniques and an overview of the current …
Nickel sulfide fire assay improved for pre …
Nickel sulfide fire assay improved for pre-concentration of platinum group elements in geological samples: a practical means of ultra-trace analysis combined with inductively …
OneMine | Pre-Concentration of Platinum Group and Base …
Whilst dense medium separation is best known for its ability to concentrate diamond and coal deposits, the process is now being employed in southern Africa as a pre-concentration step to improve the economics of platinum group metal and nickel ores. DMS plants built for these industries (such as the 1600tph unit at Tati Nickel, Botswana), …