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    Available High-Purity Materials

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    In recent years there has been a marked increase in the demand for highpurity metals and compounds for use in spectrochemical analysis, one of the principal uses being the preparation of standards in the absence of analyzed samples. High purity in this report generally refers to a purity greater than 99.5 per cent. However, a few metals or compounds with purity less than this figure have been included because no source for the higher purity material was known. The results of the present survey of high-purity materials, shown in Table 62,5 include 86 elements or their compounds and 864 entries. The data have been assembled in tabular form beginning with actinium and continuing in alphabetical order through zirconium. Under each element, the metal is listed first, followed by the compounds, salts, or solutions, which are also alphabetized. Compounds are listed under the element of particular interest; for example, ammonium molybdate is listed under molybdenum, and potassium perrhenate under rhenium. Entries for a particular metal or compound are arranged in the order of decreasing purity as given by the supplier. When the purity of a material was not given by the supplier, the material is listed last. Under the description column of the table, an attempt is made to give all available pertinent information including impurity elements, concentrations, form of material, and supplier's catalog numbers.

    Committee/Subcommittee: E02.10

    DOI: 10.1520/STP45967S