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Sampling device for measuring water body release gas phase

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

Active Publication Date: 2014-05-14
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 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 measuring water body release gas phase
  • Sampling device for measuring water body release gas phase
  • Sampling device for measuring water body release gas phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a sampling device for gas phase determination of gas released from water includes a gas chromatograph injection port 7 and a gas cylinder 4 that collects gas released from water. The mouth of the gas cylinder 4 is opened with The two plugs inserted into the holes are closed; it also includes a water storage tank 1. The bottom of the water storage tank 1 is provided with a water outlet, and is connected to the gas cylinder 4 through a water inlet pipe 2, and the water inlet pipe 2 passes through the bottle plug The insertion hole on the upper part of the gas cylinder 4 is inserted into the bottom of the gas cylinder 4, the water inlet pipe 2 is also provided with a water valve 3; also includes a sample injection pipe 8, one end of the sample pipe 8 is set in the collection through the insertion hole on the bottle stopper At the mouth of the gas cylinder 4, the other end is connected to the inlet 7 of the gas chromatograph.

[0028] Thus, a water s...

Embodiment 2

[0035] First, fill the sample bottle with pure water, and choose a standard mixed gas arbitrarily. The standard mixed gas selected in this embodiment contains N 2 It is 15.5%, carbon dioxide 2.1%, methane 43.3%, and the same amount of standard mixed gas is stored in vacuum bags, vacuum bottles and gas cylinders for subsequent accuracy testing.

[0036] For the standard mixed gas stored in the vacuum bag and the vacuum bottle, the traditional sampling detection method is adopted.

[0037] (1) Conventional injection sampling method: store the standard mixed gas in a vacuum bag and a vacuum bottle, collect the gas with a gas-tight needle and inject the sample into the gas chromatograph for comparison and analysis. The sampling time is 0, 1, 2, 3, 5, and 7 days. Store the same standard concentration mixed gas in the vacuum bag and the vacuum bottle. At the beginning of sample injection, use a gas-tight needle to pierce the vacuum bag and the rubber stopper of the vacuum bottle into th...

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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 environmental monitoring of water bodies, and more specifically to a sampling device for gas phase determination of gas released from water bodies. [0002] Background technique [0003] In addition to the emission of methane and other greenhouse gases in water bodies, photosynthesis will release oxygen, and the process of nitrification and denitrification will release nitrogen and nitrous oxide. Among them, nitrogen release may be one of the important ways to achieve purification of water bodies, especially eutrophic water bodies. In-depth study of the law of nitrogen gas released from eutrophic water is of great significance for greenhouse gas emissions and the denitrification and purification of eutrophic water. To achieve direct in-situ collection and research of gas released from water bodies, the problem of sample collection and measurement methods must first...

Claims

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Application Information

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Patent Type & Authority Applications(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
Owner JIANGSU ACAD OF AGRI SCI
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