The rapid separation and determination of barium, strontium, and calcium in rocks and minerals. By G. H. OSBORN, A.R.I.C. [Read March 28, 1946.] C ALCIUM is one of the most widespread and abundant of metals, coming fifth on the list of elements and third among the oxides of the outer lithosphere ; ...
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Here, a two-stage column separation scheme is developed for the concomitant isolation of Sr, Pb, Nd, and Hf from geological samples. The first column, which consists of three resin layers (AG50W-X8 ion exchange resin + Ln specific resin + Sr specific resin), separates the high field strength element + rare earth element, Sr and Pb from the matrices.
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Ferric dithizonate has been extracted from alkaline solutions and observed to exhibit a maximum absorb ance at 435 millimicrons. This dithizonate of iron has prevented accurate …
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New results on lead isotope compositions of standard rock samples and their analytical procedures are reported. Bromide form anion exchange chromatography technique was adopted for the chemical separation of lead from rock samples.
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The results indicate that the volatilization method must be used with care when total lead composition is required and that important information regarding the history of the rock may be determined in a simple fashion utilizing the inhomogeneous distribution of lead in the rocks.
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A new low blank separation scheme for lead is presented for the preparation of ultrapure lead samples for isotopic analysis by thermal ionisation mass spectrometry. The …
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Here, a two-stage column separation scheme is developed for the concomitant isolation of Sr, Pb, Nd, and Hf from geological samples.
WhatsApp: +86 18221755073
Bromide form anion exchange chromatography technique was adopted for the chemical separation of lead from rock samples. The lead contamination during whole analytical procedure was low enough to determine lead isotope composition of common natural rocks. Silica-gel activator method was applied for emission of lead ions in the mass spectrometer.
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The results indicate that the volatilization method must be used with care when total lead composition is required and that important information regarding the history of the rock …
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Lead isotopes of Earth's accessible silicate rocks are generally too radiogenic for the planet to have formed from meteoritic material—a problem known as the first Pb paradox.
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A rapid low blank method is described for the separation of lead by sequential cathodic and anodic deposition from a variety of matrices, especially complex natural silicates. …
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Selective dissolution of the metals from igneous rocks, a mechanism of separation often postulated in the literature, was tested by treating basaltic andesite with a number of solvents at temperatures ranging from 25 to 300°C. ... Selective oxidation and precipitation by different species of bacteria can lead to partial separation of the ...
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A new low blank separation scheme for lead is presented for the preparation of ultrapure lead samples for isotopic analysis by thermal ionisation mass spectrometry. The method benefits from the selectivity and high capacity of a new …
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Electrochemical lead separation from copper, copper alloy, silver and silver alloy for isotope ratio determination in archaeometric investigations. Analytica Chimica Acta 2003, 497 (1-2), 227-233.
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A straightforward tandem column separation procedure is presented for the separation of Sr, Nd, Pb, and Hf from silicate materials. It allows rapid purification, without any intervening evaporation, of these four elements of great interest in Earth science and cosmochemistry. After sample loading, the upper Sr Spec column adsorbs Sr and Pb, while …
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The choice of the dithizone extraction method was based on the selectivity of the reaction, which assures a fast efficient separation of lead from a rock matrix. The choice of …
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During the separation of lead from rock, one common byproduct obtained is sulfur dioxide gas. This byproduct is a result of the oxidation of sulfur-containing minerals present in the rock during ...
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SEPARATION OF Ra AND Th FROM ROCK MATRICES FOR ALPHA-SPECTROMETRY R. G. DITCHBURN, N, E. WHITEHEAD ... EDTA as elutant, which was said to lead to t.omplete separation of Ba from Ra at pH 10.5. FLORES-MENDOZA et al.27 could not reproduce this at any pH between 8.8 and 10.5 or with other reagents between pH 6 and 11.5. ...
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Ferric dithizonate has been extracted from alkaline solutions and observed to exhibit a maximum absorb ance at 435 millimicrons. This dithizonate of iron has prevented accurate determinations in our laboratory of lead in mafic igneous rocks containing 10 percent or more iron.
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In most rocks, lead occurs at low concentrations and behaves geochemically like the alkalis and alkaline earths. ... Processing of lead-bearing ores typically involves physical separation as is the case with all lead minerals. However, some lead-bearing ores might be chemically processed; for example, a cyanidation process is used to treat lead ...
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Electrochemical lead separation from copper, copper alloy, silver and silver alloy for isotope ratio determination in archaeometric investigations. Analytica Chimica Acta 2003, 497 (1-2), 227-233.
WhatsApp: +86 18221755073
The choice of the dithizone extraction method was based on the selectivity of the reaction, which assures a fast efficient separation of lead from a rock matrix. The choice of solvents was made for convenience in discarding layers.
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The most frequently used method for lead separation from multicomponent systems is the ion-exchange chromatography [1–4], and special Pb-selective resins [5]. ... Quantitative determination of iron and aluminium in some alloys and silicate rocks after a cation exchange separation on zirconium(iv) phospho and silico arsenates. 1983, Journal of ...
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The key for both processes is the separation of radiogenic lead from common lead. Chiaradia and Fontboté ( 2003 ) demonstrated that radiogenic lead is preferentially leached …
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Determinations of isotopic composition of lead and strontium in basalts and peridotite were performed on samples recovered from Holes 332A and 332B and Sites 334 and 335. For five of the samples, lead concen-trations were determined by isotopic dilution.
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The key for both processes is the separation of radiogenic lead from common lead. Chiaradia and Fontboté ( 2003 ) demonstrated that radiogenic lead is preferentially leached from rock powders during weak acid attack, whereas common lead is preferentially leached during stronger acid attacks; a similar response has been noted in K-feldspar (cf ...
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A rapid low blank method is described for the separation of lead by sequential cathodic and anodic deposition from a variety of matrices, especially complex natural silicates. The technique is … Expand
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A selective separation and quantitative determination procedure for 210Pb and 210Po in various environmental matrices from different sources such as IAEA-326 soil, phosphate rocks (PR), and ...
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Determinations of isotopic composition of lead and strontium in basalts and peridotite were performed on samples recovered from Holes 332A and 332B and Sites 334 and 335. For five …
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Study with Quizlet and memorize flashcards containing terms like The rock cycle, Use the rock cycle to explain the statement "One rock is the raw material for another.", What is magma? ... How might this process lead to the formation of several different igneous rocks from a single magma? ... The separation of minerals by mechanisms such as ...
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