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Sample preparation device and method for carbon-oxygen isotope micro-zone analysis of carbonate

An oxygen isotope and micro-area analysis technology, which is applied in the direction of measuring devices, analysis materials, and preparation of test samples, can solve the problems of unused use in the geological field, and achieve the effects of easy modification and upgrading, simple structure, and improved test efficiency

Pending Publication Date: 2020-02-14
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

However, this technology is currently mainly used in the biological field, and has not yet been used in the geological field.

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  • Sample preparation device and method for carbon-oxygen isotope micro-zone analysis of carbonate
  • Sample preparation device and method for carbon-oxygen isotope micro-zone analysis of carbonate
  • Sample preparation device and method for carbon-oxygen isotope micro-zone analysis of carbonate

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Embodiment Construction

[0040] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0041] like Figure 1 ~ Figure 4 Shown, a kind of sample preparation device of carbonate carbon-oxygen isotope micro-area analysis comprises phosphoric acid capillary microsampler 1 and carbonate sample cell 2;

[0042] The carbonate sample cell 2 comprises a cavity body 21 and a top cover 22. The side of the cavity body 21 is respectively provided with a helium gas inlet 23 and a carbon dioxide gas outlet 24. The top cover 22 is provided with a microscope for passing through a microinjection needle. The microinjection needle opening 25; the outlet of the phosphoric acid capillary microsampler 1 injects phosphoric acid into the sample in the carbonate sample cell through the microinjection needle, and the carbon dioxide gas outlet 24 is connected with the carbon-oxygen isotope tester 3 through the carbon dioxide gas outlet tube Connected; the...

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Abstract

The invention discloses a sample preparation device and method for carbon-oxygen isotope micro-zone analysis of carbonate. The device comprises a phosphoric acid capillary microsyringe and a carbonatesample cell; a helium inlet and a carbon dioxide outlet are respectively formed in the side surface of an enclosed cavity of the carbonate sample cell and a micro-injection needle opening is formed in a top cover of the carbonate sample cell; an outlet of the phosphoric acid capillary microsyringe injects phosphoric acid onto a sample in the carbonate sample cell through a micro-injection needle;the carbon dioxide outlet is connected with a carbon-oxygen isotope tester; a sample frame is mounted on an electric-control three-axis sample table; and a temperature control plate is arranged at the bottom of the sample frame. According to the device, the micro-injection needle is adopted to inject phosphoric acid micro-droplets to have a reaction with the carbonate sample, and gas generated bythe reaction is collected to carry out carbon-oxygen isotope, so that both relatively high space resolution and data accuracy are considered and micro-zone in-situ analysis is realized; and the device is low in cost and simple in structure.

Description

technical field [0001] The invention relates to a sample preparation device and a sample preparation method for carbonate carbon-oxygen isotope micro-area analysis. Background technique [0002] Carbon-oxygen isotope research is an important means to study carbonate (rock), and micro-area in-situ analysis method is the frontier and trend of geoscience research. The conventional carbonate (rock) carbon-oxygen isotope analysis method is the phosphoric acid method (McCree, 1950), through the reaction of phosphoric acid and carbonate minerals to generate CO 2 The gas is sent to the mass spectrometer for analysis; the data obtained by this method are stable and easy to operate, but it requires the minerals and rocks to be tested to be sorted and crushed, and the required sample volume is large and the spatial resolution is low, which obviously cannot It meets the requirements of current micro-area in situ analysis. Moreover, this method cannot effectively distinguish the micros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N1/28
CPCG01N1/28G01N30/06
Inventor 宋昊李圻徐进勇石雅静徐争启司飞晏文权聂睿姚畅
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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