Sampling device for gas phase determination of released gas from water body

A sampling device and gas technology, which are applied in the field of sampling devices for gas phase measurement of water released gas, to achieve the effects of eliminating air pollution samples, avoiding intermediate links, and avoiding air pollution samples

Active Publication Date: 2016-02-17
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to realize the in-situ research on the release of gases from water bodies, especially nitrogen release, solve the problems of direct collection of gases released from water bodies in situ in the field, accurate quantification and precise volume injection to gas chromatography without interference and precise sampling

Method used

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  • Sampling device for gas phase determination of released gas from water body
  • Sampling device for gas phase determination of released gas from water body
  • Sampling device for gas phase determination of released gas from water body

Examples

Experimental program
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Embodiment 1

[0023] Such as figure 1 Shown, a kind of sampling device that is used for gas-phase determination of water release gas, comprises gas chromatograph inlet 7, also comprises the gas collection bottle 4 that has collected water body release gas, and described gas collection bottle 4 bottlenecks are opened with The bottle stoppers of the two insertion holes are closed; a water storage tank 1 is also included, and the bottom of the water storage tank 1 is provided with a water outlet, and communicated with the gas collecting bottle 4 through the water inlet pipe 2, and the water inlet pipe 2 passes through the bottle stopper The insertion hole on the top is inserted into the bottom of the gas collection bottle 4, and the water inlet pipe 2 is also provided with a water valve 3; it also includes a sampling pipeline 8, and one end of the sampling pipeline 8 is arranged on the collection via the insertion hole on the bottle stopper. At the mouth of the gas cylinder 4, the other end co...

Embodiment 2

[0030] First, the sample bottle is filled with pure water, and a standard mixed gas is selected arbitrarily, and the standard mixed gas selected in this embodiment contains N 2 15.5%, 2.1% carbon dioxide, and 43.3% methane. Store equal amounts of standard mixed gases in vacuum bags, vacuum bottles, and gas bottles for subsequent accuracy testing.

[0031] For the standard mixed gas stored in vacuum bags and vacuum bottles, the traditional sampling detection method is adopted,

[0032] (1) Conventional injection sampling method: store the standard mixed gas in vacuum bags and vacuum bottles, collect gas with an airtight needle and inject samples into the gas chromatograph for comparison and analysis. The sampling time was the 0th, 1st, 2nd, 3rd, 5th, and 7th day. Store the same standard concentration mixed gas in the vacuum bag and vacuum bottle. At the beginning of sample injection, use an airtight needle to pierce the rubber stopper of the vacuum bag and vacuum bottle into ...

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Abstract

The invention relates to a sampling device for measuring a water body release gas phase, aiming at realizing the in-situ research of water body release gas, particularly nitrogen release, and solving the problems of outdoor in-situ direct collection of the water body release gas and accurate sampling of the water body release gas to a gas phase chromatograph without interference, with accurate ration and accurate volume. The sampling device for measuring the water body release gas phase disclosed by the invention comprises a gas phase chromatograph sampling port, a gas collecting bottle for collecting water body release gas as well as a water storing tank and a sampling pipeline, wherein the bottom of the water storing tank is provided with a water outlet which is communicated with the gas collecting bottle through a water inlet pipe; the water inlet pipe is inserted into the bottom of the gas collecting bottle through an inserting hole formed in a bottle plug; one end of the sampling pipeline is arranged at a bottle port of the gas collecting bottle through the inserting hole formed in the bottle plug, and the other end of the sampling pipeline is communicated with the gas phase chromatograph sampling port. The sampling device provided by the invention has the advantages that the direct sampling for the detection of the gas phase chromatograph is realized under a normal pressure state, the middle links such as sampling are avoided, and the problems that the generated air pollutes a sample and the like are avoided.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to the field of water body environment monitoring, and more specifically relates to a sampling device for gas-phase determination of released gas from water bodies. Background technique [0002] In addition to the emission of greenhouse gases such as methane, water bodies will release oxygen during photosynthesis, and nitrogen and nitrous oxide gases will be released during nitrification and denitrification. Among them, nitrogen release may be one of the important ways to denitrify water bodies, especially eutrophic water bodies. In-depth study of the law of nitrogen gas released from eutrophic water bodies is of great significance for the emission of greenhouse gases and the denitrification and purification of eutrophic water bodies. In order to realize in-situ direct collection and research of gases released from water bodies, it is first necessary to solve the problems of...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01N30/16
Inventor刘新红高岩张振华王红莲易能范如芹王岩严少华
OwnerJIANGSU ACAD OF AGRI SCI