Device and method for extracting water content of soil sample
A soil sample and moisture technology, applied in the research field of basic laws of hydrology or soil science, can solve the problems of inconvenient operation, high risk, low precision, etc., and achieve the effects of easy operation, safe and feasible device, and reasonable structure.
Inactive Publication Date: 2011-01-05
HOHAI UNIV
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Problems solved by technology
The azeotropic method uses benzene, which is toxic, dangerous, and inconvenient to operate; the centrifugal separation method is not applicable when the water content of the soil sample is low, and the accuracy of the centrifugal separation method to extract soil water for isotope analysis lower
Method used
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Embodiment Construction
[0019] Below in conjunction with accompanying drawing, the present invention will be further described:
[0020] Immerse the bottom of the flask (2) containing a certain amount of soil sample into the water of the water bath heating device (1), insert the glass tube into the bottle mouth, and connect the other end of the glass tube to the air inlet pipe (4) through the air gauge (3), and the air inlet pipe ( 4) The other end passes through the frosted glass stopper (6) of the test tube (7) and is inserted into the test tube (7). , connect the vacuum pump (9). Test tube (7) is placed in the container (8) that fills liquid nitrogen, and the tube mouth of the inlet pipe (4) in test tube (7) is higher than the tube mouth of air outlet pipe (5), and the diameter range of test tube (7) is 3 -4cm, the diameter of air inlet pipe (4) and air outlet pipe (5) is identical, and the diameter ratio with test tube (7) is 1: 4. Each joint is sealed with a vacuum ester, and the water bath he...
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Abstract
The invention discloses a device for extracting the water content of a soil sample, consisting of a water bath heating device, a flask, an air pressure gauge, an air intake tube, an air outtake tube, a frosted glass plug, a test tube, a container holding liquid nitrogen and a vacuum pump. The device is characterized in that the lower part of the flask which holds the soil is provided with the water bath heating device; a glass tube is inserted into a flask mouth; the other end of the glass tube is connected with the air intake tube through the air pressure gauge; the other end of the air intake tube passes through the frosted glass plug of the test tube, and is inserted into the test tube; one end of the air outtake tube passes through the frosted glass plug of the test tube and is inserted into the other end of the test tube to be connected with the vacuum pump; the test tube is placed into the container which holds the liquid nitrogen; a tube mouth of the air intake tube in the test tube is higher than a tube mouth of the air outtake tube; and the water bath heating device, the flask, the container holding liquid nitrogen and the test tube are fixed through a support. The soil sample is placed into the flask when the device works to extract the air in the device, and is heated by using the water bath heating device, and vapor is condensed by using a condensation device continuously working for 5-7 hours so that the water in the soil sample is completely extracted.
Description
1. Technical field [0001] The invention relates to a device and method for extracting soil moisture required in hydrology or soil science experiments, which are mainly used in the research of basic laws of hydrology or soil science. 2. Background technology [0002] In the experiment of the basic law of hydrology, the method of isotope hydrology is commonly used to study the infiltration mechanism of water in the soil and the hydrological scientific law of flow generation and confluence in other watersheds. This requires extracting the water in the soil, not only to obtain the information of the soil water content, but also to measure the hydrogen and oxygen isotope content of the water through instruments, and then analyze and study the basic laws of infiltration and other watersheds. In the watershed hydrological simulation, because the hydrological law is unknown, the utilization information of the hydrological model is very limited, but in the actual simulation, more use...
Claims
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IPC IPC(8): B01D3/10B01D5/00
Inventor 包为民张波王涛李倩瞿思敏石朋
Owner HOHAI UNIV