Determination of palladium and platinum by atomic absorption

Schnepfe, Marian M.; Grimaldi, F.S.

doi:10.1016/0039-9140(69)80080-9

Cited by 51 publications

(4 citation statements)

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“…24. Determine the chemical yield of Pt by the atomic absorption procedure of Schnepfe and Grimaldi (1969).…”

Section: Determination Of Platinum and Palladium By Fire-assay Preconmentioning

confidence: 99%

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A manual on fire assaying and determination of the noble metals in geological materials

Haffty¹,

Riley²,

Goss³

1977

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Detailed directions are given for use of fire-assay techniques to separate and concentrate the noble metals Ag, Au, Ir, Os, Pd, Pt, Rh, Ru from many varieties of samples. Included are procedures for selecting appropriate assay charges based on approximate chemical compositions of the samples. Whenever such data are available, a saving of time by avoiding reruns is generally possible even with minimal mineralogical information. Also included are descriptions of methods currently being used by the U.S. Geological Survey for the determination of the various noble metals, mostly after concentration by fire assay.

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“…24. Determine the chemical yield of Pt by the atomic absorption procedure of Schnepfe and Grimaldi (1969).…”

Section: Determination Of Platinum and Palladium By Fire-assay Preconmentioning

confidence: 99%

“…This method is described in detail by Schnepfe and Grimaldi (1969). It consists of preconcentrating palladium and platinum in a gold bead using fire-assay techniques followed by atomic absorption to determine their concentration.…”

Section: Determination Of Palladium and Platinum By Atomic Absorptionmentioning

confidence: 99%

A manual on fire assaying and determination of the noble metals in geological materials

Haffty¹,

Riley²,

Goss³

1977

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“…The catalysts were then dried overnight at 100 OC and pre-reduced in 15 g batches at 250 "C. Most catalysts contained 0.5% platinum by weight. The exact amount was determined by atomic absorption spectroscopy (10).…”

Section: Murc~riulsmentioning

confidence: 99%

The Influence of the Substrate on Hydrogen–Water Deuterium Exchange over Carbon Supported Platinum

Sagert¹,

Pouteau²

1972

Can. J. Chem.

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Re.sr~orc11 Cltrtt~istry Brot~cl~. Wl~i/e.shell Nuclear Reseorcll Estublisl~tnent, Atonlic Energy of Cunud(~ Lir~~itrd. Pit1uit.u. Mut~itobu. ROE 1 LO Received May 19, 1972 Rate data for hydrogen-water deuterium isotope exchange are reported for a number of platinum on carbon catalysts whose carbon supports were graphitized to varying degrees before the metal was deposited on the support. The exchange over platinum black was studied for comparison. Over carbon supported catalysts, the rate was almost independent of hydrogen pressure and increased approximately linearly with water pressure. The rate controlling step seems to be the transfer of deuterium between chemisorbed hydrogen atoms and physisorbed HDO.Activation energies for the rate determining step decreased from 14 kcal/mol over unsupported platinum to as low as 2 kcal/mol over highly graphitized supports. Rates increased with heat treatment temperatures up to 2100 "C. These effects are ascribed to electron transfer from the carbon support to the metal, resulting in a weaker Pt-H bond, and faster exchange. However they may be partially the result of non-linear adsorption of water.Nous rapportons les donnees de vitesse d'echange isotopique hydrogene-deuterium dans l'eau pour certains catalyseurs de platine sur carbone dont les supports de carbone furent prealablement traites au graphite A differents degres, avant que le metal soit depose sur le support. Pour comparer, nous avons etudie l'echange sur noir de platine. Avec des catalyseurs sur carbone, la vitesse est a peu prts independante de la pression d'hy-

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“…Although copper sulphate was added in a large excess, the interferences were not completely eliminated. Another study (5) showed that the serious depressive inter-element interferences of Ag, Al, Au, Bi, Ca, Co, Cr, Fe, Hg, K, Mg, Mn, Mo, and Ni were removed by buffering the solution with a mixture of cadmium and copper sulphates, each at 0.5%.…”

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Characterization and elimination of cationic interferences on platinum

Mostafa¹,

Kabil²

1986

Can. J. Chem.

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Interfering effects of different cations on the atomic absorption signal of platinum can be completely eliminated by adding n-butylamine. The releasing action of n-butylamine comes through the formation of a volatile, platinum–amine complex, so the platinum species reaching the flame will normally be independent of the original composition of the solution. The inhibition release titration method has been used in studying the interfering effects to achieve a determinate characterization of compound formation.

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Determination of palladium and platinum by atomic absorption

Cited by 51 publications

References 1 publication

A manual on fire assaying and determination of the noble metals in geological materials

A manual on fire assaying and determination of the noble metals in geological materials

The Influence of the Substrate on Hydrogen–Water Deuterium Exchange over Carbon Supported Platinum

Characterization and elimination of cationic interferences on platinum

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