Device and method for measuring content of organic carbon in soil
An organic carbon and soil technology, applied in the field of environmental scientific research, can solve the problems of low recovery rate, complicated operation, long time consumption, etc., and achieve the effect of fast analysis speed, simple steps and convenient operation.
Inactive Publication Date: 2014-07-23
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology
Potassium dichromate external heating method is more complicated to operate, takes a long time, causes more pollution, and the recovery rate is also lower
[0005] The total organic carbon analyzer method uses a combination of high-temperature electric furnace burning and gas chromatography to automatically analyze the content of total organic carbon. This method has high stability and recovery rate, and is currently the most accurate method for measuring soil organic carbon content. , but because many scientific researchers are limited by the equipment, this method has not been widely used
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Embodiment Construction
[0033] The device for measuring soil organic carbon content of the present invention is as figure 1 Shown is a vacuum system that constitutes a closed loop. specifically:
[0034] A vacuum pump A, which can be a rotary vane vacuum pump, is used to maintain the vacuum degree of the sample preparation system. The limit of the system vacuum degree can reach 2 The collection pipe H is connected; the other two interfaces of the second high vacuum tee joint C2 are respectively connected to the extruded tube B and the water trap E; the second high vacuum tee joint C2 and the water trap E are provided with a second Two high vacuum valves D2 and water trap E are used to condense water vapor and purify CO 2 . The water trap E is connected to the CO through the high vacuum two-way joint F 2 One end of cold trap G is connected, CO 2 The cold trap G is immersed in pure liquid nitrogen to reach a temperature of -185°C to condense CO 2 Gas, while the remaining miscellaneous gas is pumpe...
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The invention discloses a device for measuring the content of organic carbon in soil. The device comprises a vacuum pump connected with a liquid nitrogen cold trap through a corrugated pipe, and two high-vacuum three-way joints, wherein one high-vacuum three-way joint is connected with the liquid nitrogen cold trap and a CO2 collection pipe, and the other high-vacuum three-way joint is connected with a squeezing pipe and a water capturing trap; a helical valve is arranged on the squeezing pipe; the water capturing trap is connected with the CO2 collection pipe through a CO2 cold trap; two helical valves are arranged on the top of the CO2 cold trap. The device forms a vacuum system. The invention also discloses a method for measuring the content of the organic carbon in the soil by using the device. The device and the method have the advantages of convenience in operation, low cost, high analysis speed, batch measurement and the like.
Description
technical field [0001] The invention belongs to the field of environmental science research, in particular to a device for measuring soil organic carbon content. [0002] The invention also relates to a method for measuring soil organic carbon content by using the above-mentioned device. Background technique [0003] Soil organic matter is an important part of the soil solid matrix. Although it only accounts for a small part of the soil in terms of weight, it is closely related to soil fertility, soil carbon sequestration, soil environmental detoxification function, and sustainable agricultural development. relation. First of all, soil organic matter contains very rich nutrients needed by microorganisms and plants. It is the energy source for the life activities of plants and microorganisms, and has a profound impact on the basic physical and chemical properties of soil; secondly, a large part of soil organic matter is humus. It has a very active redox ability, which will ...
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Inventor 檀文炳何小松席北斗高如泰袁英李晨辰
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI