Extraction system for analyzing oxygen isotope in water and method for performing oxygen isotope analysis in water by using extraction system

An extraction system and oxygen isotope technology, which is applied to the extraction system of oxygen isotope in water and the field of oxygen isotope analysis in water, can solve the problems of large error in analysis data, high temperature stability requirements, and poor data repeatability, etc., and achieve the analysis results Accurate, avoid test data error, simple and convenient operation

Active Publication Date: 2019-03-29
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The purpose of the present invention is to overcome the high temperature stability requirements of the online detection method in the existing water oxygen isotope analysis method, the obvious memory effect leads to poor repeatability of the measured data, the accuracy is not high enough, the analysis data error is large and It has defects such as inability

Method used

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  • Extraction system for analyzing oxygen isotope in water and method for performing oxygen isotope analysis in water by using extraction system
  • Extraction system for analyzing oxygen isotope in water and method for performing oxygen isotope analysis in water by using extraction system
  • Extraction system for analyzing oxygen isotope in water and method for performing oxygen isotope analysis in water by using extraction system

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0082] According to a specific embodiment of the present invention, the method for performing oxygen isotope analysis in water using the aforementioned extraction system for oxygen isotopes in water comprises the following steps:

[0083] (i) Place the plurality of balancers 12 that have collected water samples on the fixed carrier 11, and connect them to the vacuuming main line 33 through their independent gas pipelines, and open the control panel The solenoid valve in the module 14 makes the gas pipeline of each balancer 12 communicate with the vacuum main pipeline;

[0084] (ii) Open the switches of the second valve V2, the third valve V3, the fourth valve V4, the ninth valve V9, and the first mechanical pump 31, the second mechanical pump 32, and the molecular pump 7, for the balance unit 1 Each balancer 12 and the pipeline are evacuated to a predetermined degree of vacuum, the second valve V2, the third valve V3, the fourth valve V4 and the ninth valve V9 are closed, and ...

Embodiment 1-24

[0108] (i) using as figure 1 In the extraction system shown, the twenty-four balancers 12 that have collected water samples are placed on the fixed carrier 11, and connected to the vacuuming trunk line 33 through their independent gas pipelines, Open the solenoid valve in the control panel module 14, so that the gas pipeline of each balancer 12 and the vacuum main pipeline are in a state of communication, wherein, for example, image 3 As shown, the balancers 12 are arranged in the form of a rectangular array with 3 rows×8 columns and are evenly distributed on the fixed carrier 11. The height of the included diameter tubular container is 5cm, the inner diameter is 2cm concentric variable diameter pipe fitting glass container, the injection port of each balancer 12 is a threaded injection port, which is welded with the vacuum auxiliary pipeline 16. The independent gas path of the stainless steel pipe of the threaded joint 15 whose threaded injection port of the balancer 12 is ...

Embodiment 25-32

[0122] Using the extraction system used in Examples 1-24, the analysis of oxygen isotopes in water was carried out according to the method of Example 1-24, except that in the rectangular array of 3 rows × 8 columns, the fixed carrier 11 was Among the twenty-four balancers 12 arranged uniformly above, eight balancers 12 are randomly selected to collect eight kinds of standard water samples for carbon dioxide-water equilibrium exchange reaction. After the carbon dioxide-water equilibrium exchange reaction is completed, three carbon dioxide samples obtained from the tested standard water samples after performing oxygen isotope exchange and equilibrium with carbon dioxide are collected one by one for isotopic analysis.

[0123] Table 3 shows the types, dosages, test results and standard values ​​of oxygen isotope ratios in the water samples used in Examples 25-32.

[0124] table 3

[0125]

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Abstract

The invention relates to the technical field of isotope analysis, and discloses an extraction system for analyzing oxygen isotope in water and a method for performing oxygen isotope analysis in waterby using the extraction system. The extraction system includes a balancing unit, a sample collection unit and a vacuum supply, wherein the balancing unit and the sample collection unit communicate andare connected with the vacuum supply unit in order, the balancing unit comprises a plurality of balances, the sample collection unit comprises a plurality of sample collection tubes, and the extraction system greatly integrates the balancing unit and the sample collection unit so as to simplify the experiment operation and improve the experiment efficiency. The method for performing oxygen isotope analysis in water by using the extraction system is high in stability, good in reproducibility, high in the test precision and accurate in analysis data, and effectively avoids the large test data caused by the memory effect.

Description

technical field [0001] The invention relates to the technical field of stable isotope analysis, in particular to an extraction system for oxygen isotopes in water and a method for using the extraction system to analyze oxygen isotopes in water. Background technique [0002] The composition and content of hydrogen and oxygen isotopes in natural water are affected by complex geophysics, geochemistry and biochemistry, and isotope fractionation occurs during evaporation and condensation. As a result of isotopic fractionation, various natural waters have different isotopic characteristics, which makes stable isotope technology widely used in geology, hydrology, hydrogeology, atmospheric science, ecology and other fields. Isotope analysis has gradually become one of the modern research methods in the field of water science. The stable isotopic composition of water is considered to be the "fingerprint" of water and plays an increasingly important role in the analysis of dynamic pr...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N33/18
Inventor 李洪伟冯连君
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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