Sealed tool for standard gas preparation and preparation device comprising same

Abstract

The invention provides a sealed tool for standard gas preparation, and further provides a device comprising the same for standard gas preparation, and a method for preparing standard gas by using the provided device. The sealed tool comprises a hollow body, a reagent bottle, which is fixedly arranged in the body and is used for standard gas preparation, and a breaking device. When the breaking device is pushed by an external force, the breaking device will break the reagent bottle arranged in the sealed tool. The tool is sealed by a sealing material, and thus the volatile gas will not leak from the sealed tool. During the whole preparation process, the reagent and volatile gas are confined in a sealed environment, the gas will not diffuse in the air, the possible harms to operators can be avoided, and moreover the preparation precision may improved.

Description

Technical field [0001] The present invention relates to a sealing device for preparing standard gas, and a device for preparing standard gas including the sealing device and a method for preparing standard gas using the device. Background technique [0002] In chemical experiments, standard gases with low boiling point, toxic, flammable or explosive characteristics are often prepared. For example, ethyl chloride is a commonly used reagent in chemical experiments, especially as a reaction inhibitor during the epoxidation of ethylene, so it is often necessary to prepare ethyl chloride standard gas. The boiling point of ethyl chloride under normal pressure is only 12.27℃, so it is very volatile when exposed to air. And the reagent is a flammable and explosive hazardous chemical, and its explosion limit in the air is 3.8-15.4%. In addition, ethyl chloride gas has a certain stimulating and anesthetic effect on the human body, and can be absorbed by the human body through the skin an...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the sampler is suitable for sampling in process pipelines, and requires a special sampling valve, which is not suitable for sampling in glass reagent bottles; another type of injection gravimetric gas distribution device is characterized by a gas distribution device for liquid samples. The component gas in the tank and the gas used for dilution are filled independently of each other to avoid mutual contamination. The airtight performance of the system is better, and the accuracy of standard gas configuration is higher.

However, how to put the volatile liquid in the reagent bottle into the small steel cylinder, and whether the process of putting it in will cause environmental pollution and personal injury have not been involved, and there is no solution; The sampling device is characterized by a sampler that can be closely matched with the depth gauge on the pressurized liquid storage tank, and the sampler can avoid the leakage of the sampling medium and pollute the environment

However, a suitable depth gauge must be installed on the container, and the sampler is not suitable for sampling in glass reagent bottles

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