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Method for preparing rare earth-doped calcium tungstate crystals for quantitative calibration of elements

A technology of rare earth doping and rare earth elements, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of large errors in quantitative calibration results, systematic errors, obvious differences in silicate matrix, etc., and achieve uniformity sex good effect

Active Publication Date: 2019-09-13
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the matrix difference between tungstate and silicate is obvious, which will cause serious matrix effect. Therefore, if silicate is used to quantitatively correct the content of trace elements in scheelite during LA-ICP-MS analysis, systematic errors will be introduced. ; Especially when the content of the element to be measured is low, the error of the quantitative calibration result is large

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  • Method for preparing rare earth-doped calcium tungstate crystals for quantitative calibration of elements
  • Method for preparing rare earth-doped calcium tungstate crystals for quantitative calibration of elements
  • Method for preparing rare earth-doped calcium tungstate crystals for quantitative calibration of elements

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Embodiment 1

[0026] A method for preparing rare earth-doped calcium tungstate crystals and using it for LA-ICP-MS quantitative correction of rare earth elements in scheelite, the specific steps are as follows:

[0027] (1) Weigh 0.0016g of lanthanum oxide, 0.0016g of cerium oxide, 0.0017g of praseodymium oxide, 0.0017g of neodymium oxide, 0.0017g of samarium oxide, 0.0018g of europium oxide, 0.0018g of gadolinium oxide, 0.0018g of terbium oxide, and 0.0019g of dysprosium oxide, Holmium oxide 0.0019g, erbium oxide 0.0019g, thulium oxide 0.0019g, ytterbium oxide 0.0020g, lutetium oxide 0.0020g, yttrium oxide 0.0011g, calcium carbonate 1.9600g, tungsten trioxide 4.6360g, anhydrous sodium carbonate 0.01590g. Transfer the weighed medicine to an agate mortar, add an appropriate amount of absolute ethanol, and grind for one hour;

[0028] (2) Transfer the fully ground medicine to a clean crucible, and then perform high-temperature roasting in a muffle furnace to complete high-temperature solid-ph...

Embodiment 2

[0034] A method for preparing rare earth-doped calcium tungstate crystals and using it for LA-ICP-MS quantitative correction of rare earth elements in scheelite, the specific steps are as follows:

[0035] (1) Weigh 0.0048g of lanthanum oxide, 0.0048g of cerium oxide, 0.0051g of praseodymium oxide, 0.0051g of neodymium oxide, 0.0051g of samarium oxide, 0.0054g of europium oxide, 0.0054g of gadolinium oxide, 0.0054g of terbium oxide, and 0.0057g of dysprosium oxide, Holmium oxide 0.0057g, erbium oxide 0.0057g, thulium oxide 0.0057g, ytterbium oxide 0.0060g, lutetium oxide 0.0060g, yttrium oxide 0.0033g, calcium carbonate 1.9600g, tungsten trioxide 4.6360g, anhydrous sodium carbonate 0.01590g. Transfer the weighed drug to an agate mortar, add absolute ethanol submerged in the above drug, and grind for one and a half hours;

[0036] (2) Transfer the fully ground medicine to a clean crucible, and then perform high-temperature roasting in a muffle furnace to complete high-temperatu...

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Abstract

The invention discloses a method for preparing rare earth-doped calcium tungstate crystals for LA-ICP-MS quantitative calibration of rare earth elements in scheelite, specifically comprising the following steps: firstly preparing a powder mixture of calcium carbonate, tungsten trioxide, rare earth oxides and a small amount of sodium carbonate, adding a proper amount of anhydrous ethanol and fullygrinding; transferring the fully-ground chemical into a crucible, completing a high-temperature solid-phase reaction in a muffle furnace, placing the chemical calcined in the muffle furnace into a micro-falling crystal growing furnace, followed by charging, temperature rise, seeding, equal diameter growth, pull-off, cooling and the like to complete crystal growth, and finally obtaining the rare earth-doped calcium tungstate crystals. The rare earth-doped calcium tungstate crystals have uniform color but have no obvious color difference. The matrix composition is calcium tungstate, the doped rare earth element has good uniformity in the crystals, and the calcium tungstate crystals have basically consistent laser ablation morphology with a tungsten ore sample. The product can be used as a calibration material for LA-ICP-MS quantitative calibration of rare earth elements in scheelite.

Description

technical field [0001] The invention relates to the field of micro-region trace element analysis of minerals, in particular to a method for preparing rare-earth-doped calcium tungstate crystals and using the same for LA-ICP-MS quantitative correction of rare-earth elements in scheelite. Background technique [0002] The main chemical composition of scheelite is calcium tungstate. By studying the concentration and distribution information of rare earth elements in scheelite, we can provide important scientific basis for exploring redox conditions during the ore-forming period, tracing the source of ore-forming materials, and inferring the genesis of ore deposits. . [0003] In order to obtain the concentration of rare earth elements in scheelite, it is very important to accurately determine the content of rare earth elements in mineral samples. In traditional analysis methods, mineral samples are often pulverized and digested to make a solution, and then analyzed and detecte...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B15/20G01N30/02G01N30/06
CPCC30B15/20C30B29/32G01N30/02G01N30/06G01N2030/045
Inventor 柯于球孙益坚王伟林马浩帮邵剑峰游诗勇
Owner JIANGXI UNIV OF SCI & TECH
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