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Separation method of boron in gypsum mineral and/or hard gypsum mineral and measurement method of boron isotope

A separation method and technology of anhydrite, applied in the direction of measuring devices, analysis materials, preparation of test samples, etc., can solve problems such as ineffective dissolution, separation and extraction, unfavorable analysis and application of boron isotope composition characteristics, and the impact of recovery on mass spectrometry analysis, etc.

Active Publication Date: 2018-05-04
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Problems solved by technology

It can be seen that the general method of acid hydrolysis of evaporite samples either cannot effectively dissolve gypsum and / or anhydrite minerals to separate and extract boron, or will affect the recovery rate of boron, boron isotope fractionation, boron isotope mass spectrometry analysis, etc. Large impact, not conducive to the analysis and application of boron isotope composition characteristics

Method used

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  • Separation method of boron in gypsum mineral and/or hard gypsum mineral and measurement method of boron isotope
  • Separation method of boron in gypsum mineral and/or hard gypsum mineral and measurement method of boron isotope
  • Separation method of boron in gypsum mineral and/or hard gypsum mineral and measurement method of boron isotope

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Embodiment

[0034] The present embodiment provides a method for separating boron in gypsum minerals, comprising the following steps:

[0035] Purification: use sodium metatungstate monohydrate to prepare a specific gravity of 2.31g / cm 3 The heavy liquid, the impure gypsum mineral sample and the above heavy liquid are fully stirred in a polyethylene centrifuge tube, and then centrifuged in a centrifuge with a speed of 2000r / min for 10min, and the centrifuged gypsum mineral sample is deboronized After quick washing with water, dry at 40°C in an oven, and then perform XRD diffraction analysis until the mass percentage of gypsum in the gypsum mineral sample is 98% to 100%;

[0036] Reaction: Take 1g of the purified gypsum mineral sample and place it in the first polyethylene centrifuge tube, add 2g of ammonium bicarbonate and 10mL of boron-deionized water to it for reaction, and obtain the first supernatant and precipitate after the reaction. A supernatant is placed in a second polyethylene ...

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Abstract

The invention relates to the technical field of ore element separation and measurement, in particular to a separation method of boron in a gypsum mineral and / or a hard gypsum mineral and a measurementmethod of boron isotope. The separation method comprises the following steps: reaction: taking a sample(s) of a gypsum mineral and / or a hard gypsum mineral, adding ammonium hydrogen carbonate and boron-removed ionized water, reacting to obtain first supernate and a sediment, and adding hydrochloric acid into the sediment for reacting, thus obtaining second supernate after the sediment is wholly decomposed; separation: performing boron enrichment on the first supernate through a boron special resin exchange column, regulating pH of the second supernate to be alkaline, and then performing boronenrichment through the boron special resin exchange column; leaching the boron special resin exchange column with enriched boron, thus obtaining boron-containing leacheate; enabling the boron-containing leacheate with boron content not smaller than 1mu g / g to pass through an anion-cation mixed resin exchange column, thus obtaining a neutral boron containing solution. By adopting the separation method, boron in indissolvable minerals can be extracted, and boron isotope fractionation hardly occurs.

Description

technical field [0001] The invention relates to the technical field of separation and determination of ore elements, in particular to a method for separating boron in gypsum minerals and / or anhydrite minerals and a method for determining boron isotopes. Background technique [0002] Evaporite is a sequence of minerals that are evaporated and precipitated from water bodies such as sea and lake water, including carbonate, sulfate and chloride salt minerals. It is an important raw material for human production and life, and it is also a good carrier for the study of environmental changes. The depositional scale and economic value of evaporites and the environmental information they reflect are mainly controlled by the source of diagenetic materials and their evolution process. Therefore, the source and evolution history of evaporite minerals can be effectively traced and retrieved according to the element and isotopic composition characteristics of evaporite minerals. [0003] ...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N1/34G01N1/28
CPCG01N1/28G01N1/34G01N27/626
Inventor 秦占杰都永生樊启顺山发寿张湘如李庆宽
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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