By F. E. Beamish
Read Online or Download Analysis of Noble Metals. Overview and Selected Methods PDF
Similar general & reference books
Evolving function of mass spectrometry in drug discovery and improvement / Dil M. Ramanathan and Richard M. LeLacheur -- Quantitative bioanalysis in drug discovery and improvement: rules and purposes / Ayman El-Kattan, Chris Holliman, and Lucinda H. Cohen -- Quadrupole, triple-quadrupole, and hybrid linear ion capture mass spectrometers in metabolite research / Elliott B.
This booklet classifies equipment of synthesizing a heterocyclic ring that is fused to a different ring. type relies at the useful crew or teams found in the substrate, every one bankruptcy being dedicated to the reactions of a selected pair of teams. The teams are prepared alphabetically for you to be chanced on simply.
In the course of the years 1980-81, as site visitors of the Deutsches Wollforschungsinstitut in Aachen, Germany, we have been engaged on a small publication entitled, "Principles of Peptide Synthesis". within the library of the Institute we famous that the volumes of Houben-Weyl's Handbuch der Organischen Chemie facing peptide synthesis have been rather a lot in use that they have been able to crumble as the researchers of the Institute consulted them with awesome regularity.
- Fundamentals Of PhotoChemistry
- Chemical Engineering Kinetics
- Topics in Stereochemistry, Volume 23
- Nanostructured Ceramic Oxides for Supercapacitor Applications
- Experimental Quantum Chemistry
- Mathematik für Chemiker: Eine Einführung
Additional resources for Analysis of Noble Metals. Overview and Selected Methods
The solutions were evaporated to dryness and the residue collected in a sodium chloride matrix, which was analyzed qualitatively by spectrograph. They suggested that this procedure could be made quantitative. Miyamoto (83), in 1961, used a gold-silver alloy bead from fire assaying for the spectrographic determination of platinum and palladium in ores. Ginzburg (84), in 1963, divided methods for spectrographic analyses of platinum metals into the following two groups: (1) direct determination and (2) the composite method in which use is made of preliminary enrichment of initial samples and separation of the elements to be determined as concentrate in a collecting metal.
Heat over a Meker burner until the melt appears clean and shiny; the platinum metals will appear as floating specks until they have dissolved c o m pletely. A l l o w the melt to cool to room temperature under hydrogen. A s s i g n a small triangular file to each standard; keep each file in a properly labeled, clean, container. File each master standard to obtain a sufficient amount of filings for dilution. (b) The preparation of working standards. Each of the constant gold standards con tains 5% of g o l d , platinum, palladium, rhodium, and silver in concentrations suitable for establishing spectrographic curves and contains lead to make 100%.
Results in grams per metric ton can be readily obtained by calculation but more easily by selecting a convenient metric sample w e i g h t . ) It may be necessary to assay larger samples of rocks or to c o m b i n e the lead fusion buttons from several assays to obtain an adequate concentration for detection. For the conventional fire assay (see Chapter 6, Procedure 121), add 5 m g of gold or 10 mg of silver as a collector, depending on whether a gold or silver bead is desired. W e i g h the assay bead, w h e n ready, in a graphite crucible with sufficient lead to provide either a 5% g o l d - 9 5 % lead alloy or a 10% s i l v e r - 9 0 % lead alloy.