Dithizonates of gold and palladium

Beardsley, D. A.; Briscoe, G.B.; Růžička, Jaromír; Williams, M.

doi:10.1016/0039-9140(66)80044-9

Cited by 11 publications

(3 citation statements)

References 4 publications

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“…It should be noted that the nonextractability of Pt4+ observed in this work is in disagreement with the statement that Pt4+ is very appreciably extracted by CHC13 alone (10) and Ge4+ are known to extract quantitatively from HC1 > 8 M into CHC13; however the distribution ratio falls to ~10~3 from 2 M HC1, and is expected to be still smaller from 1 M HC1 (13-15), which is in agreement with the observed nonextractability of As in this work. Washing of the Organic Phase.…”

Section: Preparation Ofcontrasting

confidence: 83%

“…PRINCIPLE OF THE METHOD It has been shown (4)(5)(6)(7)(8)(9) that the diethyldithiocarbamate anion (DDC) extracts Au3+ from CTand C104"-containing aqueous solutions either as Au(DDC)C12 (if the molar ratio DDC/Au < 1) or as Au(DDC)2C104 (if DDC/Au > 1). The high values of the extraction constant for these complexes (9) ensure a good selectivity of the extraction, if the reagent DDC is used in substoichiometric amounts (9,10). On the other hand, the impractical requirement of a substoichiometric amount of reagent can be dropped if the chelating agent DDC is introduced in excess as a metal-DDC complex whose conditional extraction constant K'ex is smaller than K'ex of Au, but larger than K'ex of other metals present in the sample.…”

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confidence: 99%

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Liquid-liquid extraction of gold with nickel bis(diethyldithiocarbamate) and its application to activation analysis

Bajo¹,

Wytténbach²

1977

Anal. Chem.

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the presence of highly polar compounds. Constituents of the polymeric fractions cannot be visualized by gas chromatography. Studies to identify individual constituents and classes of constituents in the fractions are under way. The results reported here suggest that Sephadex LH-20 gel chromatography meets many of the requirements of a fractionation procedure applicable to biological testing of synthetic fossil fuels. The procedure also promises to be useful to quantitatively analyze synfuels for chemical class content.

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Section: Preparation Ofcontrasting

confidence: 83%

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confidence: 99%

Liquid-liquid extraction of gold with nickel bis(diethyldithiocarbamate) and its application to activation analysis

Bajo¹,

Wytténbach²

1977

Anal. Chem.

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“…Some methods are characterized by fairly wide application and satisfactory reliability, but many have been developed for a specialized purpose and are unsuitable for general work. Among the important colorimetric and spectrophotometric procedures are those utilizing o-tolidine (10,14,18,25), bromaurate (14,25,26), rhodamine B (14,25), rhodanine (25,27), dithizone (7,25,28) and trioctylamine (29).…”

Section: Colorimetric and Spectrophotometric Determinationmentioning

confidence: 99%

Analysis for gold

Young¹

1980

Gold Bull

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Gold, by reason of its occurrence in the metallic state, was probably one of the first metals known to man. Its brilliant colour, high specific gravity, resistance to corrosion and excellent malleability have since given it a privileged place among metals. For several centuries in the medieval period, alchemists endeavoured to transmute base metals into gold; their efforts, of course, were unsuccessful but resulted in early knowledge of the chemical behaviour of gold and its compounds. From the beginning of quantitative chemical analysis, the high value of gold dictated careful sampling and a degree of analytical accuracy far greater than that required for all other metals except those of the platinum group.During the long association of man with gold, the determination of the latter in ores and metallurgical products has been generally carried out by fire assay. In this technique of analytical chemistry, the sample is mixed with appropriate fluxes and litharge in a crucible, .and is melted in a Turnace. Gold, having a weak af inity for non-metallic elements at high temperature, but a very streng affinity for the molten lead formed by reduction of litharge, is collected in a lead button. When the latter is heated under oxidizing conditions in a porous vessel called a cupel, the lead is rapidly oxidized to PbO which is 98.5 per cent absorbed by the cupel and 1.5 per cent volatilized, leaving the gold, and silver if present, in the form of a bead. Subsequent treatment with dilute nitric acid, termed 'parting', dissolves the silver, and the residue of gold is then weighed on a special type of balance which is sensitive to at least 0.005 mg.Though very important, fire assaying is not the only method used in the determination of gold. For many gold-bearing materials, gravimetric, volumetric and colorimetric procedures, or the techniques of atomic absorption, optical spectrography and X-ray tluorescence are employed.

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Application of the group substoichiometric separation of gold, mercuric, and cupric diethyldithiocarbamates to determining them by means of activation analysis

Kukula

Šimková

1970

J. Radioanal. Chem.

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Dithizonates of gold and palladium

Cited by 11 publications

References 4 publications

Liquid-liquid extraction of gold with nickel bis(diethyldithiocarbamate) and its application to activation analysis

Liquid-liquid extraction of gold with nickel bis(diethyldithiocarbamate) and its application to activation analysis

Analysis for gold

Application of the group substoichiometric separation of gold, mercuric, and cupric diethyldithiocarbamates to determining them by means of activation analysis

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