Underwater dissolved gas in-situ detection device and detection method thereof

Abstract

The invention relates to an underwater dissolved gas in-situ detection device and a detection method thereof. The device comprises a waterproof shell and an analyzer. The waterproof shell comprises a cabin body, an end cover and a tail cover. The end cover comprises an end cover base and a waterproof ventilation connector. The waterproof ventilation connector comprises a connector base and a connector sealing cover. A liquid buffering cavity is formed in the connector sealing cover, and a liquid inlet and a liquid outlet which are communicated with the liquid buffering cavity are formed in the outer end of the connector sealing cover. A supporting block with a plurality of through holes is installed at an opening in the inner end of the liquid buffering cavity. A waterproof breathable film is arranged on the outer side end face of the supporting block. Two gas channels are formed in the connector base, one ends of the two gas channels are communicated with the liquid buffering cavity through the supporting block, and the other ends of the two gas channels are connected with a gas inlet and a gas outlet respectively. According to the invention, dissolved matters can be directly detected in an underwater environment, the change of components and content of a sample in a sampling and transferring process is avoided, and the device is also suitable for the situation that sampling cannot be carried out in severe environments such as high pressure.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry, in particular to an underwater dissolved gas in-situ detection device and a detection method thereof. Background technique [0002] For the fields of water pollution research, submarine pipeline leakage detection, and illegal discharge supervision, it is necessary to detect dissolved organic matter and small molecules in water to conduct qualitative and quantitative analysis of the composition and content of substances in water. Existing analysis methods generally adopt the method of sampling and detection. However, the method of sampling and testing involves the transfer of samples from the sampling point to the laboratory or testing point. During this process, containers are generally required to be transported, and there may be problems such as improper handling of samples and contamination of containers. Due to changes in temperature, pressure and other conditions during the produc...

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Problems solved by technology

The automatic sampling method reduces manual labor to a certain extent, but this type of method can only measure the water quality of shallow waters, and cannot detect deep-level underwater pollution, etc., and the sampling method may cause the sample measured in the previous measurement to be polluted in the next measurement. The measurement results of this kind of sensor are generally only for the measurement of one chemical composition, and cannot be used for qualitative measurement of unknown substances.

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