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Rock degassing high-sensitivity gas chromatography and mass spectrometry combined analysis system and application method

A gas chromatography and combined analysis technology, applied in the field of gas geochemistry, can solve the problem that the gas volume cannot meet the requirements, and achieve the effect of reducing residual/impurity gas interference and reliable analysis data

Active Publication Date: 2016-04-13
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the case where the amount of gas sample is relatively small (such as gas amount < 25 ° C, 0.5ml at 1 standard atmospheric pressure), when using gas chromatography and mass spectrometry to detect separately and combine data, the gas amount cannot meet the requirements.

Method used

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  • Rock degassing high-sensitivity gas chromatography and mass spectrometry combined analysis system and application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 The method for using the combined analysis system of high-sensitivity gas chromatography and mass spectrometry for rock degassing comprises the following steps:

[0063] (1) After the rock or mineral samples are crushed, separated and cleaned, the samples with a particle size of ≤1 mm are weighed and loaded into the rock / mineral sample tube 1;

[0064] (2) Open high vacuum valve Ⅰ11, high vacuum valve Ⅲ13, high vacuum valve Ⅴ15, high vacuum valve Ⅶ17, high vacuum valve Ⅷ18, close high vacuum valve Ⅱ12, high vacuum valve Ⅳ14, high vacuum valve Ⅵ16, open high vacuum system 10, Pipeline I19 and pipeline II20 are vacuumed;

[0065] (3) The gas inlet is sealed with a gas chromatographic gasket, open the high vacuum valve IV14, and when the vacuum degree is <0.1Pa, close the high vacuum valve V15 and the high vacuum valve VII17, and inject 0.1 ml of dry air, record the pressure Ps of the membrane pressure gauge 6; after completion, close the high vacuum valve IV...

Embodiment 2

[0076] Embodiment 2 The method for using the combined analysis system of high-sensitivity gas chromatography and mass spectrometry for rock degassing comprises the following steps:

[0077] (1) Pre-crushing the rock or mineral sample to less than 1.5 cm and weighing it, then loading it into the high-vacuum electromagnetic crusher 3;

[0078] (2) Open high vacuum valve Ⅱ12, high vacuum valve Ⅲ13, high vacuum valve Ⅴ15, high vacuum valve Ⅶ17, high vacuum valve Ⅷ18, close high vacuum valve Ⅰ11, high vacuum valve Ⅳ14, high vacuum valve Ⅵ16, open high vacuum system 10, Vacuumize pipeline II20 and pipeline III21;

[0079] (3) The gas inlet is sealed with a gas chromatographic gasket, open the high vacuum valve IV14, and when the vacuum degree is <0.1Pa, close the high vacuum valve V15 and the high vacuum valve VII17, and inject 0.1 ml of dry air, record the pressure Ps of the membrane pressure gauge 6; after completion, close the high vacuum valve IV14, open the high vacuum valve V...

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Abstract

The invention relates to a rock degassing high-sensitivity gas chromatography-mass spectrometry coupling analysis system which comprises a rock / ore sample tube, a mass spectrometer, a high-sensitivity gas chromatograph and a sample ring, wherein the rock / ore sample tube is connected with a cold trap, and the cold trap is respectively connected with a high vacuum system and the mass spectrometer; high vacuum valves I and III are arranged between the rock / ore sample tube and the cold trap; a pipeline III of which one end is connected with a gas sample injection port and the other end is connected with a high vacuum electromagnetic breaker is arranged between the high vacuum valves I and III; a high vacuum valve II is arranged between the pipeline I and the high vacuum electromagnetic breaker; a high vacuum valve IV is arranged between the pipeline I and the gas sample injection port; a membrane pressure gauge, a high vacuum six-way valve and high vacuum valves VII and VIII are arranged between the cold trap and the high vacuum system; high vacuum valves V and VI are arranged between the high vacuum system and the mass spectrometer; the high vacuum six-way valve is respectively connected with the high-sensitivity gas chromatograph, the sample ring and a carrier gas input tube. The invention further discloses a use method of the system. The rock degassing high-sensitivity gas chromatography-mass spectrometry coupling analysis system has the advantages of less sample using amount and high detection sensitivity.

Description

technical field [0001] The invention relates to the technical field of gas geochemistry, in particular to a rock degassing high-sensitivity gas chromatography and mass spectrometry joint analysis system and a use method. Background technique [0002] Gas components (such as H 2 , N 2 , O 2 , CO, CO 2 , SO 2 、H 2 S, CH 4 、C 2 h 4 、C 2 h 6 、C 3 h 8 , He and Ar, etc.) are conducive to exploring the origin, source, chemical characteristics, coupled coexistence mechanism of these gases and the environment and evolution they reflect, and have important scientific significance for a deep understanding of the evolution of the earth and planets. [0003] In the study of fluid inclusions, the chemical composition of the volatile components of fluid inclusions in rock minerals is an important information that can be obtained in various studies of fluid inclusions. In the process of research on the genesis of shale gas and its accumulation law, it is a convenient and direct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 李立武曹春辉贺坚邢蓝田李中平杜丽
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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