Method and apparatus for collecting and processing microgas in quartz tube
A processing method and technology for trace gas, which are applied in sampling devices, preparation of samples for testing, etc., can solve the problems of complex process, high cost, difficult cleaning, etc., and achieve the effects of low analysis cost, convenient replacement and convenient cleaning.
Inactive Publication Date: 2009-08-12
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology
The above steps (3) and (4) have the following problems: (A) the experimental steps are complicated, and it takes 1 hour to process a sample; (B) cold traps, vacuum systems, oxygen welding equipment, liquid nitrogen, dry ice and other substances are required, and Two quartz tubes are required to process one sample, the process is complicated and the cost is high; (C) the inner wall of the metal hose is easily polluted and difficult to clean
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[0016] Refer to figure 1 As shown, the device for collecting and processing trace gases in a quartz tube of the present invention includes a glass tube body 1 and a quartz tube 11 placed in the glass tube body 1. A valve 2 is provided on the right side of the glass tube body 1. The left end of 1 is provided with a sealing rubber plug 3, a mandrel base 4 is provided in the middle of the glass tube body 1, and a mandrel 5 is provided in the mandrel base 4, and the inner end of the mandrel 5 extends into the tube body 1. , The ejector rod 5 and the ejector rod seat 4 are threadedly connected, a rotating handle 6 is provided at the outer end of the ejector rod 5, and a sealing ring 7 is provided between the ejector rod 5 and the ejector rod seat 4. The rod 5 moves into the glass tube body 1 or exits the ejector rod seat 4; the inner wall of the glass tube body 1 opposite to the inner end of the ejector rod 5 is provided with two spaced protrusions 8, which are made of glass tube The ...
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The invention discloses a method and device for collecting and treating trace gas in a quartz tube. The method is (1) filing a file mark in the middle of the quartz tube; Suspend the middle part of the quartz tube and make the file marks face the mandrel; (3) connect the glass tube body to the mass spectrometer and then evacuate; (4) use the mandrel to break the quartz tube from the file marks; The moisture released by the quartz tube is absorbed by the dehydrated body; (6) Open the valve to allow CO2 gas to enter the mass spectrometer; the device includes a glass tube and a quartz tube, the glass tube has a valve and a sealing rubber plug, and there is a push rod in the middle of the glass tube There is a ejector rod with a handle screwed inside the ejector rod seat; there are two spaced protrusions on the inner wall of the glass tube; the two sides of the quartz tube are supported by two protrusions, and the inner end of the ejector rod is opposite to the file mark in the middle of the quartz tube , there is a dehydration pipe body between the quartz pipe and the valve; the invention is used for stable isotope analysis of organic carbon in soil or rocks.
Description
Technical field [0001] The present invention relates to a method for analyzing carbon isotope, in particular to a method for collecting and processing trace gas in a quartz tube for stable isotope analysis of organic carbon in soil or rock. The present invention also relates to a device for implementing the above method. Background technique [0002] In the research of geochemistry and environmental chemistry, it is sometimes necessary to analyze the stable isotope of organic carbon in soil or rock. For samples with very low organic carbon content, the current methods commonly used at home and abroad are: (1) Place the sample powder in a quartz tube, then put the linear copper oxide and platinum wire catalyst, and then vacuum the quartz tube for two End melting seal; (2) The quartz tube is heated to 900℃ in an electric furnace, at this time organic carbon and oxygen released by copper oxide combine to form CO 2 And water; (3) The heated quartz tube is placed in a metal hose. Afte...
Claims
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IPC IPC(8): G01N1/44G01N1/22
Inventor 刘金钟贾望鲁向同寿
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI