The Separation and Determination, by Atomic-absorption Spectrophotometry, of Trace Elements in High-purity Platinum and Palladium Materials. Laboratory Method No 78-35 PDF Download
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Languages : en
Pages : 9
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Book Description
A description is given of the separation procedures that allow the measurement, by atomic-absorption spectrophotometry (AAS), of trace impurities, including other noble metals and base metals, in high-purity platinum or palladium materials. The report describes in detail the procedure for the separation of platinum from palladium when either element is present as the major constituent in the sample material. The separation procedure involves extraction of the palladium as the dimethylglyoxime complex into chloroform. The mean recoveries of platinum and palladium, after separation and measurement by AAS, are better than 95 per cent, with relative standard deviations ranging between 1,2 and 3,2 per cent.
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Category :
Languages : en
Pages : 9
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Book Description
A description is given of the separation procedures that allow the measurement, by atomic-absorption spectrophotometry (AAS), of trace impurities, including other noble metals and base metals, in high-purity platinum or palladium materials. The report describes in detail the procedure for the separation of platinum from palladium when either element is present as the major constituent in the sample material. The separation procedure involves extraction of the palladium as the dimethylglyoxime complex into chloroform. The mean recoveries of platinum and palladium, after separation and measurement by AAS, are better than 95 per cent, with relative standard deviations ranging between 1,2 and 3,2 per cent.
Author: Robbie Victor David Robért
Publisher:
ISBN: 9780869998786
Category : Atomic absorption spectroscopy
Languages : en
Pages : 9
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Author:
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Category :
Languages : en
Pages : 5
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In the determination of trace levels of impurities in high-purity rhodium and iridium materials by atomic-absorption spectrophotometry, significant interference is encountered from the high concentration level of the major element, despite the use of releasing agents. This report describes the experimental work carried out, firstly, on the extent of the interference and, secondly, on methods of separation that will permit interference-free measurement of the impurities. Chromatographic separation of the major element from the other noble metals is achieved by use of cellulose powder as the stationary phase and a mixture of tributyl phosphate and toluene as the mobile phase. Base-metal impurities are separated by means of the cation exchanger Dowex 50W-X8. Although the determination of rhodium, iridium, and ruthenium as impurities is not as good as that of platinum and palladium, the method does afford a means of analysing the ammonium chloride salts of rhodium and iridium at the 99,99 per cent purity level. With furnace atomization, the lower limits of determination range from 0,5 ug/g for palladium to 5,0 ug/g for iridium, with precisions varying between 3 and 23 per cent.
Author: J. Haines
Publisher:
ISBN: 9780869995761
Category : Atomic absorption spectroscopy
Languages : en
Pages : 12
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ISBN:
Category : Metallurgy
Languages : en
Pages : 1516
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Author:
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ISBN:
Category : Metallurgy
Languages : en
Pages : 88
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Category : Nuclear energy
Languages : en
Pages : 1052
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Author: Zeev Alfassi
Publisher: CRC Press
ISBN: 9780849352133
Category : Science
Languages : en
Pages : 490
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Book Description
Accurate determination of trace elements is critical in various fields of science and technology. Direct measurement of trace elements in samples with complex matrices is often impractical, either due to analytical sensitivity limitations or matrix interferences. Preconcentration procedures are generally needed to eliminate matrix interferences and/or enrich minute amounts of analytes to a level for reliable measurements. Preconcentration Techniques for Trace Elements provides up-to-date information on various preconcentration techniques and detailed discussions regarding such topics as the dissolution of matrices, coprecipitation, solvent extraction, electrochemical means, ion exchange, sorption, chromatographic methods, flotation, membranes, volatization, polymer foam sorbents, fire assay, isotachophoresis, and filter papers. This comprehensive volume, featuring contributions from 21 experts from nine countries, will provide valuable reference material for all scientists and technicians dealing with trace analysis of real-world samples.
Author: Asha Varma
Publisher:
ISBN:
Category : Atomic absorption spectroscopy
Languages : en
Pages : 472
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Book Description
For each of these elements, information is provided on standard solutions and instrumental parameters, and literature citations and author-subject indices are appended to each of the Group sections. A glossary and extensive technical information on lamps and suppliers of accessories and standards are included in 10 appendices (given in Volume II).
Author:
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Category : Nuclear energy
Languages : en
Pages : 1246
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