Bulk Composition of IRSID Iron Ore and Other Non‐ Metallic Reference Samples

Jecko, G.

doi:10.1111/j.1751-908x.1977.tb00849.x

Cited by 5 publications

(8 citation statements)

References 2 publications

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“…Certified bulk compositions of 13 IRSID (Institut de Recherches de la Siderurgie) reference samples have been published (Jecko, 1977). The group consists of eight iron ores, a laterite, two iron ore sinters, a calcite, and a dolomite.…”

Section: Francementioning

confidence: 99%

Reference Samples in Geology and Geochemistry

Flanagan¹

1986

Geostandards Newsletter

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The use of geologic reference samples may have started in the last quarter of the 19th century after analysts in England, Germany, and the United States deplored the large variation in data obtained by different analysts for the same constitutent in the same sample. Early samples involved in cooperative analysis, also known as “round robins,” were mainly industrial or agricultural materials of economic value, or products derived from them. Data from some round robins were so diverse that “uniformity in analysis” was a part of early committee names. The first two geologic samples of the National Bureau of Standards were analyzed cooperatively. Samples for geology and geochemistry are classified as artificial samples or as natural materials of either economic or geochemical interest—the latter distinction not always possible. Artificial samples have been prepared in several substrates, and samples in other substrates may be limited only by the ingenuity of the analyst. The principal suppliers of samples of economic interest are discussed, by country, to show the range of samples prepared by organizations. Natural samples of geochemical interest are mentioned by sample type. Because of their intended use, some geochemical samples are restricted to analysts using specific techniques. Methods used for and precautions to be observed while preparing large or small rock samples are discussed. Excess grinding of small rock samples reduces the amount of FeO found in a rock analysis. Unavoidable contamination occurs when processing rocks in steel. Tungsten carbide, and some mechanical equipment, should be avoided. A review of the allied subjects of homogeneity of a sample, sampling errors, and size of the sample grains shows that we have reinvented the wheel since 1885. Methods used tc (1) test the homogeneity of samples, (2) eliminate outliers which some scientists reject repeatedly despite warnings of statisticians, and (3) estimate best values when the method for estimating should be part of the program for a sample are discussed. Calibration lines may be used to determine if “best values” in a series of several samples are really “best” and to furnish confidence limits for a single datum. The agreement of data by an analyst for a reference sample with data preferred by an issuing organization is usually described by one of several adjectives, a subjective procedure. A variation of a x2 method may be used if a producer specifies the exact number of data for the cooperative analytical program to be furnished by each analyst and then calculates the population estimates of the mean and standard deviation for an element in a sample. Because of the large increase in the number of reference samples of all types, a revised table listing samples that may be useful in geochemistry is included. It is not known if the samples, other than those of the U.S. Geological Survey, were collected in conformance with provisions of the Plant Pest Control Regulations of the U.S. Department of Agriculture, or of similar organizations in other ...

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Section: Francementioning

confidence: 99%

Reference Samples in Geology and Geochemistry

Flanagan¹

1986

Geostandards Newsletter

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show abstract

“…Certified bulk compositions of 13 IRSID (lnstitut de Recherches de la Siderurgie) reference samples have been published (Jecko, 1977). The group consists of eight iron ores, a laterite, two iron ore sinters, a calcite, and a dolomite.…”

Section: Francementioning

confidence: 99%

“…The composition of a lateritesample, M10-1, available from IRSID (lnstitut de Recherches de la Siderurgie) was given by Jecko (1977). Two Venezuelan laterites, VL-1 and VL-2, were prepared by the IVIC.…”

Section: Lateritesmentioning

confidence: 99%

“…A calcite, DOl-l, and a dolomite, D02-1, are among 13 samples for which Jecko (1977) Schron and others (1975) published the accumulated data for three sulfide mineral standards, Galena GF-1, Sphalerite SF-I , and Pyrite PS-1.…”

Section: Mineralsmentioning

confidence: 99%

“…Outer producers who certify samples are the National Institute for Metallurgy (Stoch and others, 1979), whose samples and certificates are distributed by the South African Bureau of Standards, the International Atomic Energy Agency (Dybczynski and others, 1979), the Council for Mutual Economic Assistance (CMEA) countries (Valcha, 1977), the IRSID (lnstitut de Recherches de Ia Siderurgie), which distributes iron ores and other nonmetallic samples (Jecko, 1977), the Bundesanstalt fiir Materialopriifung for the German iron ores and other samples (Pohl and Oberhauser, 1978), the BCR (Community Bureau of Reference; see Colombo and Rossi, 1978), and the Bureau of Analysed Samples in England.…”

Section: Nomenclature For Reference Samplesmentioning

confidence: 99%

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