Bottle stopper and automatic sampling method using the same

Abstract

The invention relates to a bottle plug through which an automatic gas sampler performs automatic sampling and a method for realizing automatic gas sampling by using the bottle plug. The bottle plug comprises an elastic bottle plug body for sealing a bottleneck of a sample bottle, and a pressure applying component which is arranged in the elastic bottle plug body and is provided with an inner channel, wherein a sample injection needle of the automatic sample injector can puncture the elastic bottle plug body; the pressure applying component can move from an initial sealing position to a communicating position under the action of the sample injection needle; furthermore, after the sample injection needle is taken out, the pressure applying component is reset to the initial sealing device; when the pressure applying component is positioned at the communicating position, the volume in the sample bottle can be compressed, so that the sample injection needle can be allowed to sample a gas sample in the sample bottle through the inner channel. The bottle plug can perform automatic sampling on gas, meet a requirement on large detection quantity of geochemical exploration gas samples and realize quick and accurate sampling and gas sample analysis.

Description

technical field [0001] The invention relates to the technical field of instrumental analysis, in particular to a bottle stopper used for automatic sampling by a gas autosampler and a method for using the bottle stopper to automatically sample. Background technique [0002] At present, when gas chromatographs analyze a small amount of gas samples, they generally use a micro-syringe to manually inject samples or use a quantitative tube to perform valve injection. Utilization of existing gas chromatograph autosamplers is often limited to liquid autosamplers. [0003] Although the analysis amount of gas samples for geochemical exploration is large at present, there are the following problems due to the automatic gas sampling: [0004] (1) The seal in the 2ml sample bottle cap is a round gasket. When sealing the sample bottle, under the same conditions, the pressure in the sample in the bottle is balanced with the atmospheric pressure and is at normal pressure; when the ambient ...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the large amount of detected gas samples in the prior art and the low accuracy of manual gas sampling, which cannot meet the needs of accurate and rapid analysis of the gas, the present invention provides a bottle stopper, which can The gas is automatically sampled to meet the demand for a large amount of gas samples for chemical exploration

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