Device and method for determining dissolved methane in seawater

Abstract

The invention provides a device and a method for determining dissolved methane in seawater. The device for determining dissolved methane in seawater includes: a pump, a gas cylinder, continuous flow balance extractors, a sample injection ring and a gas analyzer. Each continuous flow balance extractor comprises a spiral coil and a bubble separation chamber. The lower part of the bubble separation chamber is provided with an inlet, the upper part of the bubble separation chamber is provided with an air outlet, and the side wall is connected to a liquid outlet pipe. The upper port of the spiral coil is in connection with the inlet of the bubble separation chamber, and the lower port of the spiral coil is in connection with a liquid inlet pipe and an air inlet pipe. The pump is connected to the liquid inlet pipes, the air inlet pipes are connected to first mass flow controllers, and the gas cylinders are connected to the first mass flow controllers through a valve. The air outlet of the bubble separation chamber is in connection with the sample injection ring, which is connected to an injection port of the gas analyzer. The measurement accuracy of the device for determining dissolved methane in seawater is improved, and the analysis efficiency is enhanced.

Description

technical field [0001] The invention relates to a methane measuring device, in particular to a measuring device and method for methane dissolved in seawater. Background technique [0002] Methane is one of the most important trace gases in the atmosphere. It is also an important greenhouse gas whose content is second only to carbon dioxide. Its ability to absorb infrared radiation is more than 20 times that of carbon dioxide. Methane can also participate in atmospheric chemical reactions and affect other chemical components in the atmosphere , thereby indirectly affecting global climate change. As a flammable and slightly toxic gas, methane is also one of the important clean energy sources in the future. Based on this, methane has become a research hotspot of widespread concern around the world. The ocean is an important natural source of atmospheric methane, and the annual methane transported from the ocean to the atmosphere can reach (11-18)×10 9 kg, accounting for 2–4%...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device and method for measuring dissolved methane in seawater, which solves the defects of low accuracy and low analysis efficiency of the existing method for measuring dissolved methane in seawater, and realizes the improvement of the concentration of methane in seawater. Accuracy of on-site determination of dissolved methane and improved analysis efficiency

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