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Method and device for analyzing silicon isotope composition

A silicon isotope, infrared laser technology, applied in measurement devices, analysis materials, material analysis by electromagnetic means, etc., can solve the problems of long reaction time and large sample consumption, achieve accurate analysis, improve analysis efficiency, shorten fluorination The effect of reaction time

Pending Publication Date: 2019-04-09
INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

However, the amount of sample used in this method is relatively large, about 5-8mg; and the reaction time is relatively long. For example, the time for fluorination reaction of quartz samples at 500°C is about 8-10h, and the time for fluorination of garnet samples at 650°C The reaction time is also about 8 ~ 10h

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  • Method and device for analyzing silicon isotope composition
  • Method and device for analyzing silicon isotope composition
  • Method and device for analyzing silicon isotope composition

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Embodiment 1

[0052] The infrared laser 1-1 used in this embodiment is the MIR10 type CO produced by New Wave Company in the United States. 2 Infrared laser, gas isotope mass spectrometer 3 is MAT-253 gas isotope mass spectrometer; The silicon-containing sample used in this embodiment is NBS-28 (quartz sand, the general silicon isotope international standard substance in this field), QG (quartz glass single particle, Entrust Beijing 605 factory to process and make) and Gar (garnet single particle, the spessartine garnet in the granite pegmatite in Jianyang, Fujian); 5 Commercially available commodity, specifically will described BrF 5 Commercially available products were evaporated 25 times at -70°C (prepared with liquid nitrogen + ethanol), and the time for a single evaporation was 5 minutes.

[0053] Place the silicon-containing sample in the sample loading hole of the sample tray, place the sample tray containing the silicon-containing sample in the fluorination reactor 1-2, and connect...

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Abstract

The invention relates to the technical field of stable isotope analysis, in particular to a method and a device for analyzing a silicon isotope composition. Under an infrared laser heating condition,a silicon-containing sample and fluorinating agent are subjected to fluorination reaction, a small quantity of silicon-containing samples can be used for preparing SiF4 gas to analyze the silicon isotope composition in the silicon-containing sample, fluorination reaction time can be effectively shortened, and analysis efficiency is improved. An embodiment result indicates that the method providedby the invention has considerable accuracy with a traditional method under a situation that a sample amount is greatly reduced (the sample amount is only about 1 / 10 of the sample amount in a traditional method), and the silicon isotope composition in the small quantity of trace silicon-containing sample can be accurately analyzed.

Description

technical field [0001] The invention relates to the technical field of stable isotope analysis, in particular to a method and device for analyzing silicon isotope composition. Background technique [0002] It has become one of the important directions of the development of geochemical analysis technology to study the change of isotope composition in small scale or micro area. At present, the more commonly used method is the laser probe micro-region stable isotope analysis method. This method has low technical difficulty, low equipment cost, easy operation, high analysis precision, and the data can be compared with conventional methods. [0003] Since the 1950s, after more than half a century of exploration, people have used silicon isotope research to explore the formation process of the solar system, study the evolution history of the earth, understand the interaction of lithosphere, biosphere and hydrosphere, and carry out resource and environmental research. A series of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/34G01N1/44
CPCG01N1/34G01N1/44G01N27/62
Inventor 高建飞丁悌平范昌福胡斌
Owner INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI