Device and method for collecting and quantifying gas in water
A quantitative device and gas technology, applied in chemical instruments and methods, separation methods, sampling devices, etc., can solve the problem of inability to accurately quantify purge gas and dissolved gas, quantify dissolved gas in water, difficult to collect, store, transport, etc. problem, to achieve the effect of guaranteeing on-site testing, convenient viewing, and avoiding uncertainty
Pending Publication Date: 2022-08-05
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology
The disadvantages of dynamic headspace are 1. Specific purge gas is required. Generally, inert gas, such as argon and nitrogen, requires a large amount of gas, which is difficult to collect, store, and transport, and the cost is high; 2. Purge gas Need to use specific instruments, such as nitrogen blowing instrument, these equipments are complicated and not convenient for field sampling operation; 3. The amount of purge gas and dissolved gas cannot be accurately quantified during the sampling process, resulting in the inability to quantify the dissolved gas in water
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[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0024] like figure 1 As shown, the device for collecting and quantifying gas in water in this embodiment includes a separation bottle 5 , a gas-liquid separator 6 , a gas check valve 8 , a flow meter 9 , a peristaltic pump 10 , a sealed bottle 11 and a vacuum pump 14 . The bottle mouth of the separation bottle 5 is provided with a sealing plug for sealing the bottle body. The sealing plug is provided with two holes into which two communication pipes are respectively inserted, and two rubber pipes 101 and 102 are respectively connected to one end of the two communication pipes outside the separation bottle 5 . Two spring clips 2 and 3 are respectively provided on the two rubber ...
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The invention provides a device and a method for collecting and quantifying gas in water. The device comprises a separation bottle, a gas-liquid separator, a gas one-way valve, a flow meter, a peristaltic pump, a sealing bottle and a vacuum pump. Firstly, the device is vacuumized through a vacuum pump; when the water sample is filled in the separation bottle, the peristaltic pump is started to carry out closed circulation of the water body, gas in the water body is extracted under the action of negative pressure of the sealed bottle, and gas-liquid separation of the gas in the water body is realized through the waterproof breathable film in the gas-liquid separation bottle. Water body closed circulation is formed through the peristaltic pump, and it is ensured that gas in the water body is extracted more thoroughly through the vacuum extraction effect. The device disclosed by the invention can be directly connected to a water pumping pipeline in the field, so that rapid collection of gas in different water bodies is realized, field testing is guaranteed, and uncertainty caused by environment change is avoided; volatile gas, semi-volatile gas and non-volatile gas can be collected, water-soluble gas and water-insoluble gas can be collected, and the application range is wider.
Description
technical field [0001] The invention relates to the technical field of gas separation and measurement, in particular to a device and method for collecting and quantifying gas in water. Background technique [0002] At present, the gas collection and quantification technology in water body mostly adopts headspace technology, namely gas extraction technology, which is a simple and reliable analytical method for the determination of dissolved gas components in water body, including static headspace method and dynamic headspace method. [0003] The static headspace method is a technique in which the sample and the gas above the sample are in equilibrium in a closed container, and the gas above is directly extracted for measurement. The existing static headspace method is relatively simple. Usually, a glass bottle with a silica gel spacer cover is used as a closed system, and the sample is contained in it. Shake it with a shaker or a shaker for a period of time. After the gas in ...
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IPC IPC(8): G01N1/24B01D29/03
CPCG01N1/24B01D29/03G01N2001/242
Inventor 张应华
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS