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Ultramicro sulfur isotope analysis system and ultramicro sulfur isotope analysis method

A sulfur isotope and analysis system technology, applied in the direction of analysis materials, measuring devices, material separation, etc., can solve the problems of inability to realize ultra-trace sulfur isotope analysis and testing, low sample utilization rate, large sample consumption, etc., to reduce experimental costs, Effect of improving service life and reducing consumption

Active Publication Date: 2020-11-20
INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above reasons, the present invention aims to provide an ultra-trace sulfur isotope analysis system and analysis method to solve the problem of large sample consumption, low actual sample utilization rate, high cost of consumables, and the inability to achieve ultra-trace sulfur isotope analysis in existing analysis methods. Analysis Test Questions

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  • Ultramicro sulfur isotope analysis system and ultramicro sulfur isotope analysis method

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Embodiment 1

[0047] A specific embodiment of the present invention discloses an ultra-trace sulfur isotope analysis system for the analysis and testing of ultra-trace sulfur isotopes in sulfur-containing substances (such as rocks, soils, plants, foods, etc.), such as Figure 1 to Figure 2 As shown, the ultra-trace sulfur isotope analysis system includes along the SO 2 The elemental analyzer, the first gas pre-concentration and purification device 3, the chromatographic column 4, the second gas pre-concentration and purification device 7, and the mass spectrometer 16 are sequentially arranged on the pipeline where the gas flows; the elemental analyzer and the first gas pre-concentration and purification device 3 Connection, the first gas pre-concentration and purification device 3 is connected to the second gas pre-concentration and purification device 7 through the chromatographic column 4 , and the second gas pre-concentration and purification device 7 is connected to the mass spectrometer...

Embodiment 2

[0071] Another embodiment of the present invention discloses an ultra-trace sulfur isotope analysis method. Based on the ultra-trace sulfur isotope analysis system in Example 1, the ultra-trace sulfur in sulfur-containing substances (such as rocks, soils, plants, foods, etc.) The analysis test of isotope, ultra-trace sulfur isotope analysis method comprises the following steps:

[0072] Step 1: Prepare the sample to be tested.

[0073] Before carrying out the micro sample sulfur isotope test experiment, prepare the sample to be tested, which is sulfide or sulfate, and grind the sample to be tested to more than 200 mesh. Among them, the sulfide sample was ground to 200 mesh and directly wrapped in an aluminum cup, and the sulfate sample was ground to 200 mesh and added 5 times the weight of V 2 o 5 powder, sulphate sample with added V 2 o 5 The powder is mixed and wrapped in an aluminum cup. Sample amounts ranged from 15-40 μg for sulfide and 7-36 μg for sulfate.

[0074]...

Embodiment 3

[0092] In order to verify that the present invention can meet the analysis requirements of ultra-trace sulfur isotopes in precious samples and micro-area samples, and the test results reach the international advanced level, this example is based on the analysis system of Example 1, and utilizes the analysis method of Example 2 to analyze sulfide and Sulfate reference material was tested.

[0093] The selected national sulfide sulfur isotope standard materials are GBW04414, GBW04415 and the international sulfide sulfur isotope standard material IAEA-S-3, the composition of which is Ag 2 S; The selected international sulfate sulfur isotope standard materials IAEA-SO-5, IAEA-SO-6 and NBS-127, the composition is BaSO 4 The purity of the selected standard samples of sulfide and sulfate is greater than 99.9%, and the sample weights are 15-40 μg and 7-36 respectively. The selected standard material samples are ground to more than 200 mesh and wrapped in an aluminum cup for measuremen...

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Abstract

The invention discloses an ultramicro sulfur isotope analysis system and an ultramicro sulfur isotope analysis method, belongs to the technical field of stable isotope test, and solves the problems oflarge sample consumption, low actual sample utilization rate, high consumable cost and incapability of realizing ultramicro sulfur isotope analysis test in the conventional analysis method. The ultramicro sulfur isotope analysis system comprises an element analyzer, a first gas pre-concentration and purification device, a chromatographic column, a second gas pre-concentration and purification device and a mass spectrometer, wherein the element analyzer is connected with the first gas pre-concentration and purification device, the first gas pre-concentration and purification device is connected with the second gas pre-concentration and purification device through a chromatographic column, and the second gas pre-concentration and purification device is connected with the mass spectrometer through a universal interface. The method has the advantages of less sample consumption, high analysis efficiency, low consumable cost, realization of ultramicro sulfur isotope analysis test, analysisprecision superior to 0.40% o (1 sigma), and reaching of the advanced level of international similar laboratories.

Description

technical field [0001] The invention relates to the technical field of stable isotope testing, in particular to an ultra-trace sulfur isotope analysis system and analysis method. Background technique [0002] Sulfur exists in various forms in geological processes, and has a large isotopic fractionation at the same time. Sulfur isotope analysis is commonly used to indicate the origin and behavior of sulfur-bearing geological materials and is widely used as a tracer method in the study of igneous rocks, sediments, hydrothermal and biological processes on Earth. [0003] Measurement techniques for sulfur isotopes have been improving since the 1970s. Offline SO 2 Since pretreatment, it has been developed to allow on-line preparation and purification of SO using continuous flow techniques 2 , to recent years there have been new developments based on laser in situ analysis allowing higher spatial resolution, but the EA-IRMS technique is still an important method for sulfur isot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/08G01N30/72
CPCG01N30/02G01N30/06G01N30/08G01N30/72Y02A50/20
Inventor 范昌福武晓珮胡斌高建飞李延河
Owner INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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